220121020020 has 48 divisors (see below), whose sum is σ = 672369663168. Its totient is φ = 53362671360.

The previous prime is 220121019997. The next prime is 220121020033. The reversal of 220121020020 is 20020121022.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 220121019978 and 220121020005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166757689 + ... + 166759008.

It is an arithmetic number, because the mean of its divisors is an integer number (14007701316).

Almost surely, 2^220121020020 is an apocalyptic number.

220121020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220121020020 is an abundant number, since it is smaller than the sum of its proper divisors (452248643148).

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

220121020020 is a wasteful number, since it uses less digits than its factorization.

220121020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333516720 (or 333516718 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 220121020020 its reverse (20020121022), we get a palindrome (240141141042).

The spelling of 220121020020 in words is "two hundred twenty billion, one hundred twenty-one million, twenty thousand, twenty".