220121122011012 has 48 divisors (see below), whose sum is σ = 570686751230400. Its totient is φ = 73373403801600.

The previous prime is 220121122010969. The next prime is 220121122011019. The reversal of 220121122011012 is 210110221121022.

220121122011012 is a `hidden beast` number, since 220 + 1 + 211 + 220 + 1 + 1 + 0 + 12 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (220121122011019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22810387 + ... + 30992837.

It is an arithmetic number, because the mean of its divisors is an integer number (11889307317300).

Almost surely, 2^{220121122011012} is an apocalyptic number.

It is an amenable number.

220121122011012 is an abundant number, since it is smaller than the sum of its proper divisors (350565629219388).

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

220121122011012 is a wasteful number, since it uses less digits than its factorization.

220121122011012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8431553 (or 8431545 counting only the distinct ones).

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

Adding to 220121122011012 its reverse (210110221121022), we get a palindrome (430231343132034).

The spelling of 220121122011012 in words is "two hundred twenty trillion, one hundred twenty-one billion, one hundred twenty-two million, eleven thousand, twelve".