21122321879152 has 160 divisors (see below), whose sum is σ = 44639542886400. Its totient is φ = 9624259814400.

The previous prime is 21122321879123. The next prime is 21122321879167. The reversal of 21122321879152 is 25197812322112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8804634849 + ... + 8804637247.

It is an arithmetic number, because the mean of its divisors is an integer number (278997143040).

Almost surely, 2^{21122321879152} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21122321879152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22319771443200).

21122321879152 is an abundant number, since it is smaller than the sum of its proper divisors (23517221007248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21122321879152 is a wasteful number, since it uses less digits than its factorization.

21122321879152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4191 (or 4185 counting only the distinct ones).

The product of its digits is 241920, while the sum is 46.

The spelling of 21122321879152 in words is "twenty-one trillion, one hundred twenty-two billion, three hundred twenty-one million, eight hundred seventy-nine thousand, one hundred fifty-two".