12020120010021 has 16 divisors (see below), whose sum is σ = 16458666916608. Its totient is φ = 7798468032000.

The previous prime is 12020120010007. The next prime is 12020120010043. The reversal of 12020120010021 is 12001002102021.

It is not a de Polignac number, because 12020120010021 - 2⁷ = 12020120009893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12020120009979 and 12020120010006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020120010061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121801741 + ... + 121900386.

It is an arithmetic number, because the mean of its divisors is an integer number (1028666682288).

Almost surely, 2^{12020120010021} is an apocalyptic number.

It is an amenable number.

12020120010021 is a deficient number, since it is larger than the sum of its proper divisors (4438546906587).

12020120010021 is a wasteful number, since it uses less digits than its factorization.

12020120010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243702572.

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

Adding to 12020120010021 its reverse (12001002102021), we get a palindrome (24021122112042).

The spelling of 12020120010021 in words is "twelve trillion, twenty billion, one hundred twenty million, ten thousand, twenty-one".