220121002000020 has 96 divisors (see below), whose sum is σ = 673418545946496. Its totient is φ = 53279417958400.

The previous prime is 220121001999971. The next prime is 220121002000037. The reversal of 220121002000020 is 20000200121022.

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

It is a congruent number.

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, 259730349 + ... + 260576468.

It is an arithmetic number, because the mean of its divisors is an integer number (7014776520276).

Almost surely, 2^{220121002000020} is an apocalyptic number.

220121002000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220121002000020 is an abundant number, since it is smaller than the sum of its proper divisors (453297543946476).

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

220121002000020 is a wasteful number, since it uses less digits than its factorization.

220121002000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520307481 (or 520307479 counting only the distinct ones).

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

Adding to 220121002000020 its reverse (20000200121022), we get a palindrome (240121202121042).

The spelling of 220121002000020 in words is "two hundred twenty trillion, one hundred twenty-one billion, two million, twenty", and thus it is an aban number.