123297522091 has 2 divisors, whose sum is σ = 123297522092. Its totient is φ = 123297522090.

The previous prime is 123297522071. The next prime is 123297522133. The reversal of 123297522091 is 190225792321.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123297522091 - 2¹⁵ = 123297489323 is a prime.

It is not a weakly prime, because it can be changed into another prime (123297522071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61648761045 + 61648761046.

It is an arithmetic number, because the mean of its divisors is an integer number (61648761046).

Almost surely, 2^123297522091 is an apocalyptic number.

123297522091 is a deficient number, since it is larger than the sum of its proper divisors (1).

123297522091 is an equidigital number, since it uses as much as digits as its factorization.

123297522091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 43.

The spelling of 123297522091 in words is "one hundred twenty-three billion, two hundred ninety-seven million, five hundred twenty-two thousand, ninety-one".