12020313021 has 16 divisors (see below), whose sum is σ = 16322757120. Its totient is φ = 7866106160.

The previous prime is 12020313013. The next prime is 12020313031. The reversal of 12020313021 is 12031302021.

It is a cyclic number.

It is not a de Polignac number, because 12020313021 - 2³ = 12020313013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020313031) 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, 71176 + ... + 170606.

It is an arithmetic number, because the mean of its divisors is an integer number (1020172320).

Almost surely, 2^12020313021 is an apocalyptic number.

It is an amenable number.

12020313021 is a deficient number, since it is larger than the sum of its proper divisors (4302444099).

12020313021 is an equidigital number, since it uses as much as digits as its factorization.

12020313021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100176.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 12020313021 its reverse (12031302021), we get a palindrome (24051615042).

The spelling of 12020313021 in words is "twelve billion, twenty million, three hundred thirteen thousand, twenty-one".