122621064021 has 24 divisors (see below), whose sum is σ = 180786203520. Its totient is φ = 80065195200.

The previous prime is 122621063987. The next prime is 122621064029. The reversal of 122621064021 is 120460126221.

122621064021 is a `hidden beast` number, since 1 + 2 + 2 + 6 + 2 + 10 + 640 + 2 + 1 = 666.

It is not a de Polignac number, because 122621064021 - 2²⁵ = 122587509589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122621064029) by changing a digit.

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, 282160 + ... + 569961.

It is an arithmetic number, because the mean of its divisors is an integer number (7532758480).

Almost surely, 2^122621064021 is an apocalyptic number.

It is an amenable number.

122621064021 is a deficient number, since it is larger than the sum of its proper divisors (58165139499).

122621064021 is a wasteful number, since it uses less digits than its factorization.

122621064021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852457 (or 852454 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The spelling of 122621064021 in words is "one hundred twenty-two billion, six hundred twenty-one million, sixty-four thousand, twenty-one".