| Base | Representation |
|---|---|
| bin | 10110100010101011… |
| … | …11011011000111100 |
| 3 | 1011020102021110001110 |
| 4 | 23101111323120330 |
| 5 | 144241120333040 |
| 6 | 5320514242020 |
| 7 | 605621221443 |
| oct | 132125733074 |
| 9 | 34212243043 |
| 10 | 12102121020 |
| 11 | 5150371710 |
| 12 | 2418b86310 |
| 13 | 11ab36b872 |
| 14 | 82b401d5a |
| 15 | 4ac6e3980 |
| hex | 2d157b63c |
12102121020 has 96 divisors (see below), whose sum is σ = 36988874496. Its totient is φ = 2932070400.
The previous prime is 12102120991. The next prime is 12102121049. The reversal of 12102121020 is 2012120121.
It is an interprime number because it is at equal distance from previous prime (12102120991) and next prime (12102121049).
It is a super-2 number, since 2×121021210202 (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 = 12102120987 and 12102121005.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1326675 + ... + 1335765.
It is an arithmetic number, because the mean of its divisors is an integer number (385300776).
Almost surely, 212102121020 is an apocalyptic number.
12102121020 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 12102121020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18494437248).
12102121020 is an abundant number, since it is smaller than the sum of its proper divisors (24886753476).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12102121020 is a wasteful number, since it uses less digits than its factorization.
12102121020 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 11131 (or 11129 counting only the distinct ones).
The product of its (nonzero) digits is 16, while the sum is 12.
Adding to 12102121020 its reverse (2012120121), we get a palindrome (14114241141).
The spelling of 12102121020 in words is "twelve billion, one hundred two million, one hundred twenty-one thousand, twenty".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.070 sec. • engine limits •