22212311321261 has 2 divisors, whose sum is σ = 22212311321262. Its totient is φ = 22212311321260.

The previous prime is 22212311321191. The next prime is 22212311321269. The reversal of 22212311321261 is 16212311321222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19766747052361 + 2445564268900 = 4445981^2 + 1563830^2 .

It is a cyclic number.

It is not a de Polignac number, because 22212311321261 - 2¹⁴ = 22212311304877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22212311321269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11106155660630 + 11106155660631.

It is an arithmetic number, because the mean of its divisors is an integer number (11106155660631).

Almost surely, 2^{22212311321261} is an apocalyptic number.

It is an amenable number.

22212311321261 is a deficient number, since it is larger than the sum of its proper divisors (1).

22212311321261 is an equidigital number, since it uses as much as digits as its factorization.

22212311321261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 29.

Adding to 22212311321261 its reverse (16212311321222), we get a palindrome (38424622642483).

The spelling of 22212311321261 in words is "twenty-two trillion, two hundred twelve billion, three hundred eleven million, three hundred twenty-one thousand, two hundred sixty-one".