21133031110 has 16 divisors (see below), whose sum is σ = 38051046000. Its totient is φ = 8450636896.

The previous prime is 21133031063. The next prime is 21133031147. The reversal of 21133031110 is 1113033112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287305 + ... + 353284.

It is an arithmetic number, because the mean of its divisors is an integer number (2378190375).

Almost surely, 2^21133031110 is an apocalyptic number.

21133031110 is a deficient number, since it is larger than the sum of its proper divisors (16918014890).

21133031110 is a wasteful number, since it uses less digits than its factorization.

21133031110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643895.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 21133031110 its reverse (1113033112), we get a palindrome (22246064222).

The spelling of 21133031110 in words is "twenty-one billion, one hundred thirty-three million, thirty-one thousand, one hundred ten".