12222131021 has 4 divisors (see below), whose sum is σ = 12616393344. Its totient is φ = 11827868700.

The previous prime is 12222130993. The next prime is 12222131029. The reversal of 12222131021 is 12013122221.

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 12222131021 - 2⁶ = 12222130957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222131029) 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, 197131115 + ... + 197131176.

It is an arithmetic number, because the mean of its divisors is an integer number (3154098336).

Almost surely, 2^12222131021 is an apocalyptic number.

It is an amenable number.

12222131021 is a deficient number, since it is larger than the sum of its proper divisors (394262323).

12222131021 is an equidigital number, since it uses as much as digits as its factorization.

12222131021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394262322.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12222131021 its reverse (12013122221), we get a palindrome (24235253242).

The spelling of 12222131021 in words is "twelve billion, two hundred twenty-two million, one hundred thirty-one thousand, twenty-one".