23021221132 has 48 divisors (see below), whose sum is σ = 49599869760. Its totient is φ = 9104412672.

The previous prime is 23021221081. The next prime is 23021221133. The reversal of 23021221132 is 23112212032.

It is a super-2 number, since 2×23021221132² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23021221133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1422108 + ... + 1438204.

It is an arithmetic number, because the mean of its divisors is an integer number (1033330620).

Almost surely, 2^23021221132 is an apocalyptic number.

It is an amenable number.

23021221132 is an abundant number, since it is smaller than the sum of its proper divisors (26578648628).

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

23021221132 is a wasteful number, since it uses less digits than its factorization.

23021221132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20050 (or 20048 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 23021221132 its reverse (23112212032), we get a palindrome (46133433164).

The spelling of 23021221132 in words is "twenty-three billion, twenty-one million, two hundred twenty-one thousand, one hundred thirty-two".