12220200021 has 4 divisors (see below), whose sum is σ = 16293600032. Its totient is φ = 8146800012.

The previous prime is 12220200017. The next prime is 12220200023. The reversal of 12220200021 is 12000202221.

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 not a de Polignac number, because 12220200021 - 2² = 12220200017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220200023) 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, 2036700001 + ... + 2036700006.

It is an arithmetic number, because the mean of its divisors is an integer number (4073400008).

Almost surely, 2^12220200021 is an apocalyptic number.

It is an amenable number.

12220200021 is a deficient number, since it is larger than the sum of its proper divisors (4073400011).

12220200021 is an equidigital number, since it uses as much as digits as its factorization.

12220200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4073400010.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 12220200021 its reverse (12000202221), we get a palindrome (24220402242).

The spelling of 12220200021 in words is "twelve billion, two hundred twenty million, two hundred thousand, twenty-one".