1313132232521 has 2 divisors, whose sum is σ = 1313132232522. Its totient is φ = 1313132232520.

The previous prime is 1313132232509. The next prime is 1313132232557. The reversal of 1313132232521 is 1252322313131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1282782760000 + 30349472521 = 1132600^2 + 174211^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313132232521 - 2³⁰ = 1312058490697 is a prime.

It is a super-2 number, since 2×1313132232521² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1313132234521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656566116260 + 656566116261.

It is an arithmetic number, because the mean of its divisors is an integer number (656566116261).

Almost surely, 2^{1313132232521} is an apocalyptic number.

It is an amenable number.

1313132232521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313132232521 is an equidigital number, since it uses as much as digits as its factorization.

1313132232521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 29.

Adding to 1313132232521 its reverse (1252322313131), we get a palindrome (2565454545652).

The spelling of 1313132232521 in words is "one trillion, three hundred thirteen billion, one hundred thirty-two million, two hundred thirty-two thousand, five hundred twenty-one".