22312021128 has 32 divisors (see below), whose sum is σ = 55797660000. Its totient is φ = 7434992768.

The previous prime is 22312021097. The next prime is 22312021129. The reversal of 22312021128 is 82112021322.

It is a super-3 number, since 3×22312021128³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 22312021098 and 22312021107.

It is not an unprimeable number, because it can be changed into a prime (22312021129) 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, 68253 + ... + 221996.

It is an arithmetic number, because the mean of its divisors is an integer number (1743676875).

Almost surely, 2^22312021128 is an apocalyptic number.

It is an amenable number.

22312021128 is an abundant number, since it is smaller than the sum of its proper divisors (33485638872).

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

22312021128 is a wasteful number, since it uses less digits than its factorization.

22312021128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293461 (or 293457 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The spelling of 22312021128 in words is "twenty-two billion, three hundred twelve million, twenty-one thousand, one hundred twenty-eight".