20001102012120 has 128 divisors (see below), whose sum is σ = 61911726105600. Its totient is φ = 5166329696256.

The previous prime is 20001102012119. The next prime is 20001102012169. The reversal of 20001102012120 is 2121020110002.

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

It is a junction number, because it is equal to n+sod(n) for n = 20001102012096 and 20001102012105.

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, 17732790 + ... + 18826949.

It is an arithmetic number, because the mean of its divisors is an integer number (483685360200).

Almost surely, 2^{20001102012120} is an apocalyptic number.

20001102012120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001102012120 is an abundant number, since it is smaller than the sum of its proper divisors (41910624093480).

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

20001102012120 is a wasteful number, since it uses less digits than its factorization.

20001102012120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36559897 (or 36559893 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20001102012120 its reverse (2121020110002), we get a palindrome (22122122122122).

The spelling of 20001102012120 in words is "twenty trillion, one billion, one hundred two million, twelve thousand, one hundred twenty".