220121202111210 has 64 divisors (see below), whose sum is σ = 589221773141760. Its totient is φ = 58475797145280.

The previous prime is 220121202111179. The next prime is 220121202111253. The reversal of 220121202111210 is 12111202121022.

220121202111210 is a `hidden beast` number, since 2 + 20 + 121 + 202 + 111 + 210 = 666.

220121202111210 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×220121202111210² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1549860001 + ... + 1550002020.

It is an arithmetic number, because the mean of its divisors is an integer number (9206590205340).

Almost surely, 2^{220121202111210} is an apocalyptic number.

220121202111210 is an abundant number, since it is smaller than the sum of its proper divisors (369100571030550).

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

220121202111210 is a wasteful number, since it uses less digits than its factorization.

220121202111210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3099862300 (or 3099862294 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 220121202111210 its reverse (12111202121022), we get a palindrome (232232404232232).

The spelling of 220121202111210 in words is "two hundred twenty trillion, one hundred twenty-one billion, two hundred two million, one hundred eleven thousand, two hundred ten".