20012111220120 has 64 divisors (see below), whose sum is σ = 60072566202720. Its totient is φ = 5333342321664.

The previous prime is 20012111220119. The next prime is 20012111220203. The reversal of 20012111220120 is 2102211121002.

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 20012111220120.

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, 50123307 + ... + 50520986.

Almost surely, 2^{20012111220120} is an apocalyptic number.

20012111220120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012111220120 is an abundant number, since it is smaller than the sum of its proper divisors (40060454982600).

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

20012111220120 is a wasteful number, since it uses less digits than its factorization.

20012111220120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100645964 (or 100645960 counting only the distinct ones).

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

Adding to 20012111220120 its reverse (2102211121002), we get a palindrome (22114322341122).

The spelling of 20012111220120 in words is "twenty trillion, twelve billion, one hundred eleven million, two hundred twenty thousand, one hundred twenty".