13122031357 has 2 divisors, whose sum is σ = 13122031358. Its totient is φ = 13122031356.

The previous prime is 13122031339. The next prime is 13122031367. The reversal of 13122031357 is 75313022131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12239881956 + 882149401 = 110634^2 + 29701^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13122031357 is a prime.

It is a super-2 number, since 2×13122031357² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13122031337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6561015678 + 6561015679.

It is an arithmetic number, because the mean of its divisors is an integer number (6561015679).

Almost surely, 2^13122031357 is an apocalyptic number.

It is an amenable number.

13122031357 is a deficient number, since it is larger than the sum of its proper divisors (1).

13122031357 is an equidigital number, since it uses as much as digits as its factorization.

13122031357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 28.

Adding to 13122031357 its reverse (75313022131), we get a palindrome (88435053488).

The spelling of 13122031357 in words is "thirteen billion, one hundred twenty-two million, thirty-one thousand, three hundred fifty-seven".