121388750725430 has 16 divisors (see below), whose sum is σ = 218500167585744. Its totient is φ = 48555407783520.

The previous prime is 121388750725427. The next prime is 121388750725447. The reversal of 121388750725430 is 34527057883121.

It is a happy number.

It is a congruent number.

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, 5920916 + ... + 16668375.

It is an arithmetic number, because the mean of its divisors is an integer number (13656260474109).

Almost surely, 2^{121388750725430} is an apocalyptic number.

121388750725430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121388750725430 is a deficient number, since it is larger than the sum of its proper divisors (97111416860314).

121388750725430 is a wasteful number, since it uses less digits than its factorization.

121388750725430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23126671.

The product of its (nonzero) digits is 11289600, while the sum is 56.

The spelling of 121388750725430 in words is "one hundred twenty-one trillion, three hundred eighty-eight billion, seven hundred fifty million, seven hundred twenty-five thousand, four hundred thirty".