12220020021021 has 4 divisors (see below), whose sum is σ = 16293360028032. Its totient is φ = 8146680014012.

The previous prime is 12220020021017. The next prime is 12220020021029. The reversal of 12220020021021 is 12012002002221.

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 12220020021021 - 2² = 12220020021017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220020021029) 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, 2036670003501 + ... + 2036670003506.

It is an arithmetic number, because the mean of its divisors is an integer number (4073340007008).

Almost surely, 2^{12220020021021} is an apocalyptic number.

It is an amenable number.

12220020021021 is a deficient number, since it is larger than the sum of its proper divisors (4073340007011).

12220020021021 is an equidigital number, since it uses as much as digits as its factorization.

12220020021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4073340007010.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12220020021021 its reverse (12012002002221), we get a palindrome (24232022023242).

The spelling of 12220020021021 in words is "twelve trillion, two hundred twenty billion, twenty million, twenty-one thousand, twenty-one".