121021112220 has 48 divisors (see below), whose sum is σ = 338874311328. Its totient is φ = 32270849280.

The previous prime is 121021112203. The next prime is 121021112249. The reversal of 121021112220 is 22211120121.

It is a super-2 number, since 2×121021112220² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121021112220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2367330 + ... + 2417910.

It is an arithmetic number, because the mean of its divisors is an integer number (7059881486).

Almost surely, 2^121021112220 is an apocalyptic number.

121021112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121021112220 is an abundant number, since it is smaller than the sum of its proper divisors (217853199108).

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

121021112220 is a wasteful number, since it uses less digits than its factorization.

121021112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90470 (or 90468 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121021112220 its reverse (22211120121), we get a palindrome (143232232341).

The spelling of 121021112220 in words is "one hundred twenty-one billion, twenty-one million, one hundred twelve thousand, two hundred twenty".