121557107460 has 24 divisors (see below), whose sum is σ = 340359901056. Its totient is φ = 32415228640.

The previous prime is 121557107453. The next prime is 121557107491. The reversal of 121557107460 is 64701755121.

It is a super-2 number, since 2×121557107460² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1012975836 + ... + 1012975955.

It is an arithmetic number, because the mean of its divisors is an integer number (14181662544).

Almost surely, 2^121557107460 is an apocalyptic number.

121557107460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121557107460 is an abundant number, since it is smaller than the sum of its proper divisors (218802793596).

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

121557107460 is a wasteful number, since it uses less digits than its factorization.

121557107460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2025951803 (or 2025951801 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 39.

The spelling of 121557107460 in words is "one hundred twenty-one billion, five hundred fifty-seven million, one hundred seven thousand, four hundred sixty".