21105481106 has 32 divisors (see below), whose sum is σ = 32619417600. Its totient is φ = 10235964816.

The previous prime is 21105481069. The next prime is 21105481129. The reversal of 21105481106 is 60118450112.

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, 13467935 + ... + 13469501.

It is an arithmetic number, because the mean of its divisors is an integer number (1019356800).

Almost surely, 2^21105481106 is an apocalyptic number.

21105481106 is a deficient number, since it is larger than the sum of its proper divisors (11513936494).

21105481106 is a wasteful number, since it uses less digits than its factorization.

21105481106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2598.

The product of its (nonzero) digits is 1920, while the sum is 29.

The spelling of 21105481106 in words is "twenty-one billion, one hundred five million, four hundred eighty-one thousand, one hundred six".