21112132232 has 8 divisors (see below), whose sum is σ = 39585247950. Its totient is φ = 10556066112.

The previous prime is 21112132231. The next prime is 21112132259. The reversal of 21112132232 is 23223121112.

It can be written as a sum of positive squares in only one way, i.e., 16541560996 + 4570571236 = 128614^2 + 67606^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (21112132231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319508257 + ... + 1319508272.

Almost surely, 2^21112132232 is an apocalyptic number.

It is an amenable number.

21112132232 is a deficient number, since it is larger than the sum of its proper divisors (18473115718).

21112132232 is a wasteful number, since it uses less digits than its factorization.

21112132232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2639016535 (or 2639016531 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

Adding to 21112132232 its reverse (23223121112), we get a palindrome (44335253344).

The spelling of 21112132232 in words is "twenty-one billion, one hundred twelve million, one hundred thirty-two thousand, two hundred thirty-two".