22211031312221 has 4 divisors (see below), whose sum is σ = 22211067504000. Its totient is φ = 22210995120444.

The previous prime is 22211031312167. The next prime is 22211031312227. The reversal of 22211031312221 is 12221313011222.

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 22211031312221 - 2²⁶ = 22210964203357 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 (22211031312227) 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, 17159171 + ... + 18408128.

It is an arithmetic number, because the mean of its divisors is an integer number (5552766876000).

Almost surely, 2^{22211031312221} is an apocalyptic number.

It is an amenable number.

22211031312221 is a deficient number, since it is larger than the sum of its proper divisors (36191779).

22211031312221 is an equidigital number, since it uses as much as digits as its factorization.

22211031312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36191778.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 22211031312221 its reverse (12221313011222), we get a palindrome (34432344323443).

The spelling of 22211031312221 in words is "twenty-two trillion, two hundred eleven billion, thirty-one million, three hundred twelve thousand, two hundred twenty-one".