20112121011120 has 80 divisors (see below), whose sum is σ = 62353361971680. Its totient is φ = 5362734477312.

The previous prime is 20112121011107. The next prime is 20112121011163. The reversal of 20112121011120 is 2111012121102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

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 20112121011120.

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, 1294249 + ... + 6472968.

It is an arithmetic number, because the mean of its divisors is an integer number (779417024646).

Almost surely, 2^{20112121011120} is an apocalyptic number.

20112121011120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20112121011120 is an abundant number, since it is smaller than the sum of its proper divisors (42241240960560).

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

20112121011120 is a wasteful number, since it uses less digits than its factorization.

20112121011120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7778022 (or 7778016 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20112121011120 its reverse (2111012121102), we get a palindrome (22223133132222).

The spelling of 20112121011120 in words is "twenty trillion, one hundred twelve billion, one hundred twenty-one million, eleven thousand, one hundred twenty".