121618400100 has 36 divisors (see below), whose sum is σ = 351882571824. Its totient is φ = 32431573280.

The previous prime is 121618400093. The next prime is 121618400147. The reversal of 121618400100 is 1004816121.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 202697034 + ... + 202697633.

It is an arithmetic number, because the mean of its divisors is an integer number (9774515884).

Almost surely, 2^121618400100 is an apocalyptic number.

121618400100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121618400100 is an abundant number, since it is smaller than the sum of its proper divisors (230264171724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121618400100 is a wasteful number, since it uses less digits than its factorization.

121618400100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405394684 (or 405394677 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 24.

The spelling of 121618400100 in words is "one hundred twenty-one billion, six hundred eighteen million, four hundred thousand, one hundred".