21132331112 has 16 divisors (see below), whose sum is σ = 39693507840. Its totient is φ = 10547395696.

The previous prime is 21132331093. The next prime is 21132331127. The reversal of 21132331112 is 21113323112.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2341448 + ... + 2350455.

It is an arithmetic number, because the mean of its divisors is an integer number (2480844240).

Almost surely, 2^21132331112 is an apocalyptic number.

It is an amenable number.

21132331112 is a deficient number, since it is larger than the sum of its proper divisors (18561176728).

21132331112 is a wasteful number, since it uses less digits than its factorization.

21132331112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4692472 (or 4692468 counting only the distinct ones).

The product of its digits is 216, while the sum is 20.

Adding to 21132331112 its reverse (21113323112), we get a palindrome (42245654224).

The spelling of 21132331112 in words is "twenty-one billion, one hundred thirty-two million, three hundred thirty-one thousand, one hundred twelve".