122936681261 has 4 divisors (see below), whose sum is σ = 122954258172. Its totient is φ = 122919104352.

The previous prime is 122936681233. The next prime is 122936681297. The reversal of 122936681261 is 162186639221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 162186639221 = 89 ⋅1822321789.

It can be written as a sum of positive squares in 2 ways, for example, as 56627341225 + 66309340036 = 237965^2 + 257506^2 .

It is a cyclic number.

It is not a de Polignac number, because 122936681261 - 2³⁰ = 121862939437 is a prime.

It is a super-2 number, since 2×122936681261² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122936680261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8777960 + ... + 8791953.

It is an arithmetic number, because the mean of its divisors is an integer number (30738564543).

Almost surely, 2^122936681261 is an apocalyptic number.

It is an amenable number.

122936681261 is a deficient number, since it is larger than the sum of its proper divisors (17576911).

122936681261 is an equidigital number, since it uses as much as digits as its factorization.

122936681261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17576910.

The product of its digits is 373248, while the sum is 47.

The spelling of 122936681261 in words is "one hundred twenty-two billion, nine hundred thirty-six million, six hundred eighty-one thousand, two hundred sixty-one".