1111231313 has 2 divisors, whose sum is σ = 1111231314. Its totient is φ = 1111231312.

The previous prime is 1111231291. The next prime is 1111231343. The reversal of 1111231313 is 3131321111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1075315264 + 35916049 = 32792^2 + 5993^2 .

It is an emirp because it is prime and its reverse (3131321111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1111231313 - 2²⁸ = 842795857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1111231291 and 1111231300.

It is not a weakly prime, because it can be changed into another prime (1111231343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555615656 + 555615657.

It is an arithmetic number, because the mean of its divisors is an integer number (555615657).

Almost surely, 2^1111231313 is an apocalyptic number.

It is an amenable number.

1111231313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111231313 is an equidigital number, since it uses as much as digits as its factorization.

1111231313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54, while the sum is 17.

The square root of 1111231313 is about 33335.1363129056. The cubic root of 1111231313 is about 1035.7815168262.

Adding to 1111231313 its reverse (3131321111), we get a palindrome (4242552424).

The spelling of 1111231313 in words is "one billion, one hundred eleven million, two hundred thirty-one thousand, three hundred thirteen".