22212311321221 has 16 divisors (see below), whose sum is σ = 25744164401664. Its totient is φ = 18770346013824.

The previous prime is 22212311321191. The next prime is 22212311321261. The reversal of 22212311321221 is 12212311321222.

It is a cyclic number.

It is not a de Polignac number, because 22212311321221 - 2⁷ = 22212311321093 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 (22212311321261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8016685 + ... + 10425538.

It is an arithmetic number, because the mean of its divisors is an integer number (1609010275104).

Almost surely, 2^{22212311321221} is an apocalyptic number.

It is an amenable number.

22212311321221 is a deficient number, since it is larger than the sum of its proper divisors (3531853080443).

22212311321221 is a wasteful number, since it uses less digits than its factorization.

22212311321221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18444660.

The product of its digits is 1152, while the sum is 25.

Adding to 22212311321221 its reverse (12212311321222), we get a palindrome (34424622642443).

Subtracting from 22212311321221 its reverse (12212311321222), we obtain a palindrome (9999999999999).

It can be divided in two parts, 2221231132 and 1221, that multiplied together give a palindrome (2712123212172).

The spelling of 22212311321221 in words is "twenty-two trillion, two hundred twelve billion, three hundred eleven million, three hundred twenty-one thousand, two hundred twenty-one".