21120113210 has 16 divisors (see below), whose sum is σ = 43447090176. Its totient is φ = 7241181648.

The previous prime is 21120113191. The next prime is 21120113221. The reversal of 21120113210 is 1231102112.

It is a Harshad number since it is a multiple of its sum of digits (14).

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, 150857882 + ... + 150858021.

It is an arithmetic number, because the mean of its divisors is an integer number (2715443136).

Almost surely, 2^21120113210 is an apocalyptic number.

21120113210 is an abundant number, since it is smaller than the sum of its proper divisors (22326976966).

21120113210 is a wasteful number, since it uses less digits than its factorization.

21120113210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301715917.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21120113210 its reverse (1231102112), we get a palindrome (22351215322).

The spelling of 21120113210 in words is "twenty-one billion, one hundred twenty million, one hundred thirteen thousand, two hundred ten".