22030991261 has 2 divisors, whose sum is σ = 22030991262. Its totient is φ = 22030991260.

The previous prime is 22030991249. The next prime is 22030991287. The reversal of 22030991261 is 16219903022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16060492900 + 5970498361 = 126730^2 + 77269^2 .

It is a cyclic number.

It is not a de Polignac number, because 22030991261 - 2⁶ = 22030991197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22030991231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11015495630 + 11015495631.

It is an arithmetic number, because the mean of its divisors is an integer number (11015495631).

Almost surely, 2^22030991261 is an apocalyptic number.

It is an amenable number.

22030991261 is a deficient number, since it is larger than the sum of its proper divisors (1).

22030991261 is an equidigital number, since it uses as much as digits as its factorization.

22030991261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The spelling of 22030991261 in words is "twenty-two billion, thirty million, nine hundred ninety-one thousand, two hundred sixty-one".