121557468315432 has 32 divisors (see below), whose sum is σ = 303943076729280. Its totient is φ = 40512568646400.

The previous prime is 121557468315421. The next prime is 121557468315511. The reversal of 121557468315432 is 234513864755121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411565473 + ... + 411860720.

It is an arithmetic number, because the mean of its divisors is an integer number (9498221147790).

Almost surely, 2^{121557468315432} is an apocalyptic number.

121557468315432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121557468315432 is an abundant number, since it is smaller than the sum of its proper divisors (182385608413848).

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

121557468315432 is a wasteful number, since it uses less digits than its factorization.

121557468315432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823432353 (or 823432349 counting only the distinct ones).

The product of its digits is 24192000, while the sum is 57.

The spelling of 121557468315432 in words is "one hundred twenty-one trillion, five hundred fifty-seven billion, four hundred sixty-eight million, three hundred fifteen thousand, four hundred thirty-two".