21210122120110 has 128 divisors (see below), whose sum is σ = 49242543694848. Its totient is φ = 6385845120000.

The previous prime is 21210122120063. The next prime is 21210122120179. The reversal of 21210122120110 is 1102122101212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 137392 + ... + 6514531.

It is an arithmetic number, because the mean of its divisors is an integer number (384707372616).

Almost surely, 2^{21210122120110} is an apocalyptic number.

21210122120110 is an abundant number, since it is smaller than the sum of its proper divisors (28032421574738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21210122120110 is a wasteful number, since it uses less digits than its factorization.

21210122120110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6652090.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21210122120110 its reverse (1102122101212), we get a palindrome (22312244221322).

The spelling of 21210122120110 in words is "twenty-one trillion, two hundred ten billion, one hundred twenty-two million, one hundred twenty thousand, one hundred ten".