113131220103257 has 2 divisors, whose sum is σ = 113131220103258. Its totient is φ = 113131220103256.

The previous prime is 113131220103203. The next prime is 113131220103283. The reversal of 113131220103257 is 752301022131311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63409034554441 + 49722185548816 = 7962979^2 + 7051396^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113131220103257 is a prime.

It is not a weakly prime, because it can be changed into another prime (113131220103457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56565610051628 + 56565610051629.

It is an arithmetic number, because the mean of its divisors is an integer number (56565610051629).

Almost surely, 2^{113131220103257} is an apocalyptic number.

It is an amenable number.

113131220103257 is a deficient number, since it is larger than the sum of its proper divisors (1).

113131220103257 is an equidigital number, since it uses as much as digits as its factorization.

113131220103257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 32.

Adding to 113131220103257 its reverse (752301022131311), we get a palindrome (865432242234568).

The spelling of 113131220103257 in words is "one hundred thirteen trillion, one hundred thirty-one billion, two hundred twenty million, one hundred three thousand, two hundred fifty-seven".