121451655140 has 96 divisors (see below), whose sum is σ = 262231216128. Its totient is φ = 47234304000.

The previous prime is 121451655109. The next prime is 121451655167. The reversal of 121451655140 is 41556154121.

It is a self number, because there is not a number n which added to its sum of digits gives 121451655140.

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, 38912780 + ... + 38915900.

It is an arithmetic number, because the mean of its divisors is an integer number (2731575168).

Almost surely, 2^121451655140 is an apocalyptic number.

121451655140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121451655140 is an abundant number, since it is smaller than the sum of its proper divisors (140779560988).

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

121451655140 is a wasteful number, since it uses less digits than its factorization.

121451655140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3549 (or 3547 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 35.

The spelling of 121451655140 in words is "one hundred twenty-one billion, four hundred fifty-one million, six hundred fifty-five thousand, one hundred forty".