12002012001021 has 96 divisors (see below), whose sum is σ = 19688472800640. Its totient is φ = 6466437121536.

The previous prime is 12002012001017. The next prime is 12002012001079. The reversal of 12002012001021 is 12010021020021.

It is not a de Polignac number, because 12002012001021 - 2² = 12002012001017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12002012000988 and 12002012001006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002012001521) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 632574291 + ... + 632593263.

It is an arithmetic number, because the mean of its divisors is an integer number (205088258340).

Almost surely, 2^{12002012001021} is an apocalyptic number.

It is an amenable number.

12002012001021 is a deficient number, since it is larger than the sum of its proper divisors (7686460799619).

12002012001021 is a wasteful number, since it uses less digits than its factorization.

12002012001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20075 (or 20068 counting only the distinct ones).

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

Adding to 12002012001021 its reverse (12010021020021), we get a palindrome (24012033021042).

The spelling of 12002012001021 in words is "twelve trillion, two billion, twelve million, one thousand, twenty-one".