122721683237 has 2 divisors, whose sum is σ = 122721683238. Its totient is φ = 122721683236.

The previous prime is 122721683179. The next prime is 122721683239. The reversal of 122721683237 is 732386127221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112606553761 + 10115129476 = 335569^2 + 100574^2 .

It is a cyclic number.

It is not a de Polignac number, because 122721683237 - 2¹⁶ = 122721617701 is a prime.

It is a super-2 number, since 2×122721683237² (a number of 23 digits) contains 22 as substring.

Together with 122721683239, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122721683239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61360841618 + 61360841619.

It is an arithmetic number, because the mean of its divisors is an integer number (61360841619).

Almost surely, 2^122721683237 is an apocalyptic number.

It is an amenable number.

122721683237 is a deficient number, since it is larger than the sum of its proper divisors (1).

122721683237 is an equidigital number, since it uses as much as digits as its factorization.

122721683237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 44.

The spelling of 122721683237 in words is "one hundred twenty-two billion, seven hundred twenty-one million, six hundred eighty-three thousand, two hundred thirty-seven".