122724671621 has 2 divisors, whose sum is σ = 122724671622. Its totient is φ = 122724671620.

The previous prime is 122724671567. The next prime is 122724671683. The reversal of 122724671621 is 126176427221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98746149121 + 23978522500 = 314239^2 + 154850^2 .

It is a cyclic number.

It is not a de Polignac number, because 122724671621 - 2⁶ = 122724671557 is a prime.

It is a super-2 number, since 2×122724671621² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122724671221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61362335810 + 61362335811.

It is an arithmetic number, because the mean of its divisors is an integer number (61362335811).

Almost surely, 2^122724671621 is an apocalyptic number.

It is an amenable number.

122724671621 is a deficient number, since it is larger than the sum of its proper divisors (1).

122724671621 is an equidigital number, since it uses as much as digits as its factorization.

122724671621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 41.

The spelling of 122724671621 in words is "one hundred twenty-two billion, seven hundred twenty-four million, six hundred seventy-one thousand, six hundred twenty-one".