12000013021 has 4 divisors (see below), whose sum is σ = 12151912000. Its totient is φ = 11848114044.

The previous prime is 12000013007. The next prime is 12000013079. The reversal of 12000013021 is 12031000021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12000013021 - 2¹⁵ = 11999980253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12000012989 and 12000013007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12000013321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75949371 + ... + 75949528.

It is an arithmetic number, because the mean of its divisors is an integer number (3037978000).

Almost surely, 2^12000013021 is an apocalyptic number.

It is an amenable number.

12000013021 is a deficient number, since it is larger than the sum of its proper divisors (151898979).

12000013021 is an equidigital number, since it uses as much as digits as its factorization.

12000013021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151898978.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 12000013021 its reverse (12031000021), we get a palindrome (24031013042).

The spelling of 12000013021 in words is "twelve billion, thirteen thousand, twenty-one".