122636447291 has 2 divisors, whose sum is σ = 122636447292. Its totient is φ = 122636447290.

The previous prime is 122636447279. The next prime is 122636447363. The reversal of 122636447291 is 192744636221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 122636447291 - 2¹⁰ = 122636446267 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (122636447491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61318223645 + 61318223646.

It is an arithmetic number, because the mean of its divisors is an integer number (61318223646).

Almost surely, 2^122636447291 is an apocalyptic number.

122636447291 is a deficient number, since it is larger than the sum of its proper divisors (1).

122636447291 is an equidigital number, since it uses as much as digits as its factorization.

122636447291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 47.

The spelling of 122636447291 in words is "one hundred twenty-two billion, six hundred thirty-six million, four hundred forty-seven thousand, two hundred ninety-one".