| Base | Representation |
|---|---|
| bin | 111000011001000111… |
| … | …1100001001010101100 |
| 3 | 102120120210210200021110 |
| 4 | 1300302033201022230 |
| 5 | 3441004103404400 |
| 6 | 131344500232020 |
| 7 | 11515010061405 |
| oct | 1606217411254 |
| 9 | 376523720243 |
| 10 | 121102013100 |
| 11 | 473a4a24952 |
| 12 | 1b57899b610 |
| 13 | b55c5c1423 |
| 14 | 5c0b84a9ac |
| 15 | 323bad7e50 |
| hex | 1c323e12ac |
121102013100 has 144 divisors (see below), whose sum is σ = 356385189888. Its totient is φ = 31745794560.
The previous prime is 121102013099. The next prime is 121102013101. The reversal of 121102013100 is 1310201121.
It is an interprime number because it is at equal distance from previous prime (121102013099) and next prime (121102013101).
It is a super-2 number, since 2×1211020131002 (a number of 23 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (12).
It is not an unprimeable number, because it can be changed into a prime (121102013101) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4218997 + ... + 4247603.
It is an arithmetic number, because the mean of its divisors is an integer number (2474897152).
Almost surely, 2121102013100 is an apocalyptic number.
121102013100 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 121102013100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178192594944).
121102013100 is an abundant number, since it is smaller than the sum of its proper divisors (235283176788).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
121102013100 is a wasteful number, since it uses less digits than its factorization.
121102013100 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 28864 (or 28857 counting only the distinct ones).
The product of its (nonzero) digits is 12, while the sum is 12.
Adding to 121102013100 its reverse (1310201121), we get a palindrome (122412214221).
The spelling of 121102013100 in words is "one hundred twenty-one billion, one hundred two million, thirteen thousand, one hundred".
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