11231131313 has 2 divisors, whose sum is σ = 11231131314. Its totient is φ = 11231131312.

The previous prime is 11231131291. The next prime is 11231131361. The reversal of 11231131313 is 31313113211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10159027264 + 1072104049 = 100792^2 + 32743^2 .

It is a cyclic number.

It is not a de Polignac number, because 11231131313 - 2³² = 6936164017 is a prime.

It is a super-2 number, since 2×11231131313² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11231131913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5615565656 + 5615565657.

It is an arithmetic number, because the mean of its divisors is an integer number (5615565657).

Almost surely, 2^11231131313 is an apocalyptic number.

It is an amenable number.

11231131313 is a deficient number, since it is larger than the sum of its proper divisors (1).

11231131313 is an equidigital number, since it uses as much as digits as its factorization.

11231131313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162, while the sum is 20.

Adding to 11231131313 its reverse (31313113211), we get a palindrome (42544244524).

The spelling of 11231131313 in words is "eleven billion, two hundred thirty-one million, one hundred thirty-one thousand, three hundred thirteen".