1231532501113 has 2 divisors, whose sum is σ = 1231532501114. Its totient is φ = 1231532501112.

The previous prime is 1231532501099. The next prime is 1231532501153. The reversal of 1231532501113 is 3111052351321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 616746350224 + 614786150889 = 785332^2 + 784083^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231532501113 - 2²⁹ = 1230995630201 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231532501153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615766250556 + 615766250557.

It is an arithmetic number, because the mean of its divisors is an integer number (615766250557).

Almost surely, 2^{1231532501113} is an apocalyptic number.

It is an amenable number.

1231532501113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231532501113 is an equidigital number, since it uses as much as digits as its factorization.

1231532501113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 28.

Adding to 1231532501113 its reverse (3111052351321), we get a palindrome (4342584852434).

The spelling of 1231532501113 in words is "one trillion, two hundred thirty-one billion, five hundred thirty-two million, five hundred one thousand, one hundred thirteen".