22657121261 has 2 divisors, whose sum is σ = 22657121262. Its totient is φ = 22657121260.

The previous prime is 22657121257. The next prime is 22657121299. The reversal of 22657121261 is 16212175622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22606626025 + 50495236 = 150355^2 + 7106^2 .

It is a cyclic number.

It is not a de Polignac number, because 22657121261 - 2² = 22657121257 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22657127261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11328560630 + 11328560631.

It is an arithmetic number, because the mean of its divisors is an integer number (11328560631).

Almost surely, 2^22657121261 is an apocalyptic number.

It is an amenable number.

22657121261 is a deficient number, since it is larger than the sum of its proper divisors (1).

22657121261 is an equidigital number, since it uses as much as digits as its factorization.

22657121261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 35.

Adding to 22657121261 its reverse (16212175622), we get a palindrome (38869296883).

The spelling of 22657121261 in words is "twenty-two billion, six hundred fifty-seven million, one hundred twenty-one thousand, two hundred sixty-one".