21222123232 has 24 divisors (see below), whose sum is σ = 42194735352. Its totient is φ = 10506000000.

The previous prime is 21222123229. The next prime is 21222123257. The reversal of 21222123232 is 23232122212.

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, 3279894 + ... + 3286357.

It is an arithmetic number, because the mean of its divisors is an integer number (1758113973).

Almost surely, 2^21222123232 is an apocalyptic number.

It is an amenable number.

21222123232 is a deficient number, since it is larger than the sum of its proper divisors (20972612120).

21222123232 is a wasteful number, since it uses less digits than its factorization.

21222123232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6566362 (or 6566354 counting only the distinct ones).

The product of its digits is 1152, while the sum is 22.

Adding to 21222123232 its reverse (23232122212), we get a palindrome (44454245444).

The spelling of 21222123232 in words is "twenty-one billion, two hundred twenty-two million, one hundred twenty-three thousand, two hundred thirty-two".