22232021312 has 28 divisors (see below), whose sum is σ = 44571490740. Its totient is φ = 11001409536.

The previous prime is 22232021297. The next prime is 22232021321. The reversal of 22232021312 is 21312023222.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10003200256 + 12228821056 = 100016^2 + 110584^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1784387 + ... + 1796802.

It is an arithmetic number, because the mean of its divisors is an integer number (1591838955).

Almost surely, 2^22232021312 is an apocalyptic number.

It is an amenable number.

22232021312 is an abundant number, since it is smaller than the sum of its proper divisors (22339469428).

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

22232021312 is an equidigital number, since it uses as much as digits as its factorization.

22232021312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3581298 (or 3581288 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 22232021312 its reverse (21312023222), we get a palindrome (43544044534).

The spelling of 22232021312 in words is "twenty-two billion, two hundred thirty-two million, twenty-one thousand, three hundred twelve".