122571137779 has 2 divisors, whose sum is σ = 122571137780. Its totient is φ = 122571137778.

The previous prime is 122571137641. The next prime is 122571137783. The reversal of 122571137779 is 977731175221.

It is a strong prime.

It is an emirp because it is prime and its reverse (977731175221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122571137779 - 2⁹ = 122571137267 is a prime.

It is not a weakly prime, because it can be changed into another prime (122571137879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61285568889 + 61285568890.

It is an arithmetic number, because the mean of its divisors is an integer number (61285568890).

Almost surely, 2^122571137779 is an apocalyptic number.

122571137779 is a deficient number, since it is larger than the sum of its proper divisors (1).

122571137779 is an equidigital number, since it uses as much as digits as its factorization.

122571137779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296540, while the sum is 52.

The spelling of 122571137779 in words is "one hundred twenty-two billion, five hundred seventy-one million, one hundred thirty-seven thousand, seven hundred seventy-nine".