21112210112210 has 16 divisors (see below), whose sum is σ = 43430832230976. Its totient is φ = 7238472038448.

The previous prime is 21112210112167. The next prime is 21112210112243. The reversal of 21112210112210 is 1221101221112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150801500732 + ... + 150801500871.

It is an arithmetic number, because the mean of its divisors is an integer number (2714427014436).

Almost surely, 2^{21112210112210} is an apocalyptic number.

21112210112210 is an abundant number, since it is smaller than the sum of its proper divisors (22318622118766).

21112210112210 is a wasteful number, since it uses less digits than its factorization.

21112210112210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301603001617.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21112210112210 its reverse (1221101221112), we get a palindrome (22333311333322).

The spelling of 21112210112210 in words is "twenty-one trillion, one hundred twelve billion, two hundred ten million, one hundred twelve thousand, two hundred ten".