20120100120020 has 48 divisors (see below), whose sum is σ = 44110390641408. Its totient is φ = 7694436288000.

The previous prime is 20120100120013. The next prime is 20120100120037. The reversal of 20120100120020 is 2002100102102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20120100119983 and 20120100120010.

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, 9518981 + ... + 11439020.

It is an arithmetic number, because the mean of its divisors is an integer number (918966471696).

Almost surely, 2^{20120100120020} is an apocalyptic number.

20120100120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120100120020 is an abundant number, since it is smaller than the sum of its proper divisors (23990290521388).

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

20120100120020 is a wasteful number, since it uses less digits than its factorization.

20120100120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20960120 (or 20960118 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20120100120020 its reverse (2002100102102), we get a palindrome (22122200222122).

The spelling of 20120100120020 in words is "twenty trillion, one hundred twenty billion, one hundred million, one hundred twenty thousand, twenty".