21221231132 has 12 divisors (see below), whose sum is σ = 37927307040. Its totient is φ = 10384857696.

The previous prime is 21221231117. The next prime is 21221231149. The reversal of 21221231132 is 23113212212.

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, 56439257 + ... + 56439632.

It is an arithmetic number, because the mean of its divisors is an integer number (3160608920).

Almost surely, 2^21221231132 is an apocalyptic number.

It is an amenable number.

21221231132 is a deficient number, since it is larger than the sum of its proper divisors (16706075908).

21221231132 is a wasteful number, since it uses less digits than its factorization.

21221231132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112878940 (or 112878938 counting only the distinct ones).

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

Adding to 21221231132 its reverse (23113212212), we get a palindrome (44334443344).

The spelling of 21221231132 in words is "twenty-one billion, two hundred twenty-one million, two hundred thirty-one thousand, one hundred thirty-two".