122721550421625 has 24 divisors (see below), whose sum is σ = 221226048228744. Its totient is φ = 65451493557600.

The previous prime is 122721550421521. The next prime is 122721550421683. The reversal of 122721550421625 is 526124055127221.

122721550421625 is a `hidden beast` number, since 1 + 2 + 2 + 7 + 2 + 15 + 5 + 0 + 4 + 2 + 1 + 625 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3831114816 + 122717719306809 = 61896^2 + 11077803^2 .

It is not a de Polignac number, because 122721550421625 - 2¹⁴ = 122721550405241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

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 23 ways as a sum of consecutive naturals, for example, 54542910174 + ... + 54542912423.

It is an arithmetic number, because the mean of its divisors is an integer number (9217752009531).

Almost surely, 2^{122721550421625} is an apocalyptic number.

122721550421625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

122721550421625 is a deficient number, since it is larger than the sum of its proper divisors (98504497807119).

122721550421625 is a wasteful number, since it uses less digits than its factorization.

122721550421625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109085822618 (or 109085822605 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 45.

The spelling of 122721550421625 in words is "one hundred twenty-two trillion, seven hundred twenty-one billion, five hundred fifty million, four hundred twenty-one thousand, six hundred twenty-five".