21116100502 has 32 divisors (see below), whose sum is σ = 37156889664. Its totient is φ = 8813232000.

The previous prime is 21116100497. The next prime is 21116100529. The reversal of 21116100502 is 20500161112.

It is a self number, because there is not a number n which added to its sum of digits gives 21116100502.

It is a congruent number.

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, 36153 + ... + 208660.

It is an arithmetic number, because the mean of its divisors is an integer number (1161152802).

Almost surely, 2^21116100502 is an apocalyptic number.

21116100502 is a deficient number, since it is larger than the sum of its proper divisors (16040789162).

21116100502 is a wasteful number, since it uses less digits than its factorization.

21116100502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244984.

The product of its (nonzero) digits is 120, while the sum is 19.

Adding to 21116100502 its reverse (20500161112), we get a palindrome (41616261614).

The spelling of 21116100502 in words is "twenty-one billion, one hundred sixteen million, one hundred thousand, five hundred two".