22213021261 has 2 divisors, whose sum is σ = 22213021262. Its totient is φ = 22213021260.

The previous prime is 22213021169. The next prime is 22213021273. The reversal of 22213021261 is 16212031222.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21818244100 + 394777161 = 147710^2 + 19869^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22213021261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22213024261) 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, 11106510630 + 11106510631.

It is an arithmetic number, because the mean of its divisors is an integer number (11106510631).

Almost surely, 2^22213021261 is an apocalyptic number.

It is an amenable number.

22213021261 is a deficient number, since it is larger than the sum of its proper divisors (1).

22213021261 is an equidigital number, since it uses as much as digits as its factorization.

22213021261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 22213021261 its reverse (16212031222), we get a palindrome (38425052483).

The spelling of 22213021261 in words is "twenty-two billion, two hundred thirteen million, twenty-one thousand, two hundred sixty-one".