121530656425 has 24 divisors (see below), whose sum is σ = 151640330112. Its totient is φ = 96617976000.

The previous prime is 121530656413. The next prime is 121530656437. The reversal of 121530656425 is 524656035121.

It is an interprime number because it is at equal distance from previous prime (121530656413) and next prime (121530656437).

It is not a de Polignac number, because 121530656425 - 2⁵ = 121530656393 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

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 23 ways as a sum of consecutive naturals, for example, 3554160 + ... + 3588190.

It is an arithmetic number, because the mean of its divisors is an integer number (6318347088).

Almost surely, 2^121530656425 is an apocalyptic number.

It is an amenable number.

121530656425 is a deficient number, since it is larger than the sum of its proper divisors (30109673687).

121530656425 is a wasteful number, since it uses less digits than its factorization.

121530656425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34929 (or 34924 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 40.

The spelling of 121530656425 in words is "one hundred twenty-one billion, five hundred thirty million, six hundred fifty-six thousand, four hundred twenty-five".