22212131321 has 2 divisors, whose sum is σ = 22212131322. Its totient is φ = 22212131320.

The previous prime is 22212131311. The next prime is 22212131339. The reversal of 22212131321 is 12313121222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21479833600 + 732297721 = 146560^2 + 27061^2 .

It is a cyclic number.

It is not a de Polignac number, because 22212131321 - 2¹⁴ = 22212114937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22212131293 and 22212131302.

It is not a weakly prime, because it can be changed into another prime (22212131311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11106065660 + 11106065661.

It is an arithmetic number, because the mean of its divisors is an integer number (11106065661).

Almost surely, 2^22212131321 is an apocalyptic number.

It is an amenable number.

22212131321 is a deficient number, since it is larger than the sum of its proper divisors (1).

22212131321 is an equidigital number, since it uses as much as digits as its factorization.

22212131321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 20.

Adding to 22212131321 its reverse (12313121222), we get a palindrome (34525252543).

The spelling of 22212131321 in words is "twenty-two billion, two hundred twelve million, one hundred thirty-one thousand, three hundred twenty-one".