20012001012120 has 64 divisors (see below), whose sum is σ = 64654157121120. Its totient is φ = 4926031017984.

The previous prime is 20012001012079. The next prime is 20012001012139. The reversal of 20012001012120 is 2121010021002.

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 = 20012001012096 and 20012001012105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6414101329 + ... + 6414104448.

Almost surely, 2^{20012001012120} is an apocalyptic number.

20012001012120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012001012120 is an abundant number, since it is smaller than the sum of its proper divisors (44642156109000).

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

20012001012120 is a wasteful number, since it uses less digits than its factorization.

20012001012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12828205804 (or 12828205800 counting only the distinct ones).

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

Adding to 20012001012120 its reverse (2121010021002), we get a palindrome (22133011033122).

The spelling of 20012001012120 in words is "twenty trillion, twelve billion, one million, twelve thousand, one hundred twenty".