| Base | Representation |
|---|---|
| bin | 10110100110001000… |
| … | …01000100111001100 |
| 3 | 1011022102122012200110 |
| 4 | 23103010020213030 |
| 5 | 144321014323040 |
| 6 | 5323425400020 |
| 7 | 606421615032 |
| oct | 132304104714 |
| 9 | 34272565613 |
| 10 | 12131011020 |
| 11 | 5165704147 |
| 12 | 2426799010 |
| 13 | 11b434553b |
| 14 | 8311a2552 |
| 15 | 4aeeed980 |
| hex | 2d31089cc |
12131011020 has 96 divisors (see below), whose sum is σ = 34351853760. Its totient is φ = 3198361600.
The previous prime is 12131011019. The next prime is 12131011021. The reversal of 12131011020 is 2011013121.
It is an interprime number because it is at equal distance from previous prime (12131011019) and next prime (12131011021).
It is a super-2 number, since 2×121310110202 (a number of 21 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (12).
It is a junction number, because it is equal to n+sod(n) for n = 12131010987 and 12131011005.
It is not an unprimeable number, because it can be changed into a prime (12131011021) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7810564 + ... + 7812116.
It is an arithmetic number, because the mean of its divisors is an integer number (357831810).
Almost surely, 212131011020 is an apocalyptic number.
12131011020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 12131011020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17175926880).
12131011020 is an abundant number, since it is smaller than the sum of its proper divisors (22220842740).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12131011020 is a wasteful number, since it uses less digits than its factorization.
12131011020 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2955 (or 2953 counting only the distinct ones).
The product of its (nonzero) digits is 12, while the sum is 12.
Adding to 12131011020 its reverse (2011013121), we get a palindrome (14142024141).
It can be divided in two parts, 1213101 and 1020, that added together give a palindrome (1214121).
The spelling of 12131011020 in words is "twelve billion, one hundred thirty-one million, eleven thousand, twenty".
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