21231032132 has 48 divisors (see below), whose sum is σ = 38314907904. Its totient is φ = 10287648000.

The previous prime is 21231032113. The next prime is 21231032149. The reversal of 21231032132 is 23123013212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24043763 + ... + 24044645.

It is an arithmetic number, because the mean of its divisors is an integer number (798227248).

Almost surely, 2^21231032132 is an apocalyptic number.

It is an amenable number.

21231032132 is a deficient number, since it is larger than the sum of its proper divisors (17083875772).

21231032132 is a wasteful number, since it uses less digits than its factorization.

21231032132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740 (or 1738 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21231032132 its reverse (23123013212), we get a palindrome (44354045344).

It can be divided in two parts, 212310 and 32132, that added together give a palindrome (244442).

The spelling of 21231032132 in words is "twenty-one billion, two hundred thirty-one million, thirty-two thousand, one hundred thirty-two".