21031120132 has 24 divisors (see below), whose sum is σ = 40264090272. Its totient is φ = 9532512000.

The previous prime is 21031120129. The next prime is 21031120133. The reversal of 21031120132 is 23102113012.

It is not an unprimeable number, because it can be changed into a prime (21031120133) 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, 661494 + ... + 692557.

It is an arithmetic number, because the mean of its divisors is an integer number (1677670428).

Almost surely, 2^21031120132 is an apocalyptic number.

21031120132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21031120132 is a deficient number, since it is larger than the sum of its proper divisors (19232970140).

21031120132 is a wasteful number, since it uses less digits than its factorization.

21031120132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1354419 (or 1354417 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21031120132 its reverse (23102113012), we get a palindrome (44133233144).

The spelling of 21031120132 in words is "twenty-one billion, thirty-one million, one hundred twenty thousand, one hundred thirty-two".