21223131332 has 24 divisors (see below), whose sum is σ = 40103011200. Its totient is φ = 9769437216.

The previous prime is 21223131301. The next prime is 21223131337. The reversal of 21223131332 is 23313132212.

It is a junction number, because it is equal to n+sod(n) for n = 21223131298 and 21223131307.

It is not an unprimeable number, because it can be changed into a prime (21223131337) 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, 518732 + ... + 558147.

It is an arithmetic number, because the mean of its divisors is an integer number (1670958800).

Almost surely, 2^21223131332 is an apocalyptic number.

It is an amenable number.

21223131332 is a deficient number, since it is larger than the sum of its proper divisors (18879879868).

21223131332 is a wasteful number, since it uses less digits than its factorization.

21223131332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077275 (or 1077273 counting only the distinct ones).

The product of its digits is 1296, while the sum is 23.

Adding to 21223131332 its reverse (23313132212), we get a palindrome (44536263544).

The spelling of 21223131332 in words is "twenty-one billion, two hundred twenty-three million, one hundred thirty-one thousand, three hundred thirty-two".