122456651021 has 16 divisors (see below), whose sum is σ = 129939945984. Its totient is φ = 115004757504.

The previous prime is 122456651011. The next prime is 122456651047. The reversal of 122456651021 is 120156654221.

It is a cyclic number.

It is not a de Polignac number, because 122456651021 - 2¹⁸ = 122456388877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122456651011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17058785 + ... + 17065961.

It is an arithmetic number, because the mean of its divisors is an integer number (8121246624).

Almost surely, 2^122456651021 is an apocalyptic number.

It is an amenable number.

122456651021 is a deficient number, since it is larger than the sum of its proper divisors (7483294963).

122456651021 is a wasteful number, since it uses less digits than its factorization.

122456651021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9220.

The product of its (nonzero) digits is 28800, while the sum is 35.

The spelling of 122456651021 in words is "one hundred twenty-two billion, four hundred fifty-six million, six hundred fifty-one thousand, twenty-one".