21102220211210 has 16 divisors (see below), whose sum is σ = 39635474484096. Its totient is φ = 8073892950288.

The previous prime is 21102220211183. The next prime is 21102220211213. The reversal of 21102220211210 is 1211202220112.

It is not an unprimeable number, because it can be changed into a prime (21102220211213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45874391534 + ... + 45874391993.

It is an arithmetic number, because the mean of its divisors is an integer number (2477217155256).

Almost surely, 2^{21102220211210} is an apocalyptic number.

21102220211210 is a deficient number, since it is larger than the sum of its proper divisors (18533254272886).

21102220211210 is a wasteful number, since it uses less digits than its factorization.

21102220211210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91748783557.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21102220211210 its reverse (1211202220112), we get a palindrome (22313422431322).

The spelling of 21102220211210 in words is "twenty-one trillion, one hundred two billion, two hundred twenty million, two hundred eleven thousand, two hundred ten".