21624650121 has 8 divisors (see below), whose sum is σ = 29305537024. Its totient is φ = 14180098320.

The previous prime is 21624650119. The next prime is 21624650143. The reversal of 21624650121 is 12105642612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21624650121 - 2¹ = 21624650119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21624652121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59083561 + ... + 59083926.

It is an arithmetic number, because the mean of its divisors is an integer number (3663192128).

Almost surely, 2^21624650121 is an apocalyptic number.

It is an amenable number.

21624650121 is a deficient number, since it is larger than the sum of its proper divisors (7680886903).

21624650121 is a wasteful number, since it uses less digits than its factorization.

21624650121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118167551.

The product of its (nonzero) digits is 5760, while the sum is 30.

The spelling of 21624650121 in words is "twenty-one billion, six hundred twenty-four million, six hundred fifty thousand, one hundred twenty-one".