222131311021 has 4 divisors (see below), whose sum is σ = 222146356000. Its totient is φ = 222116266044.

The previous prime is 222131311009. The next prime is 222131311063. The reversal of 222131311021 is 120113131222.

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 222131311021 - 2⁷ = 222131310893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222131311021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222131311621) 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, 7500321 + ... + 7529878.

It is an arithmetic number, because the mean of its divisors is an integer number (55536589000).

Almost surely, 2^222131311021 is an apocalyptic number.

It is an amenable number.

222131311021 is a deficient number, since it is larger than the sum of its proper divisors (15044979).

222131311021 is a wasteful number, since it uses less digits than its factorization.

222131311021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15044978.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 222131311021 its reverse (120113131222), we get a palindrome (342244442243).

The spelling of 222131311021 in words is "two hundred twenty-two billion, one hundred thirty-one million, three hundred eleven thousand, twenty-one".