20012021022120 has 64 divisors (see below), whose sum is σ = 60036626632320. Its totient is φ = 5336488844544.

The previous prime is 20012021022047. The next prime is 20012021022131. The reversal of 20012021022120 is 2122012021002.

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 20012021022120.

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, 13071517 + ... + 14522003.

It is an arithmetic number, because the mean of its divisors is an integer number (938072291130).

Almost surely, 2^{20012021022120} is an apocalyptic number.

20012021022120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012021022120 is an abundant number, since it is smaller than the sum of its proper divisors (40024605610200).

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

20012021022120 is a wasteful number, since it uses less digits than its factorization.

20012021022120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565474 (or 1565470 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20012021022120 its reverse (2122012021002), we get a palindrome (22134033043122).

The spelling of 20012021022120 in words is "twenty trillion, twelve billion, twenty-one million, twenty-two thousand, one hundred twenty".