1311031031 has 2 divisors, whose sum is σ = 1311031032. Its totient is φ = 1311031030.

The previous prime is 1311030983. The next prime is 1311031061. The reversal of 1311031031 is 1301301131.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1311031031 - 2⁶ = 1311030967 is a prime.

It is a super-2 number, since 2×1311031031² = 3437604728489845922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1311030997 and 1311031015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311031061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655515515 + 655515516.

It is an arithmetic number, because the mean of its divisors is an integer number (655515516).

Almost surely, 2^1311031031 is an apocalyptic number.

1311031031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311031031 is an equidigital number, since it uses as much as digits as its factorization.

1311031031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27, while the sum is 14.

The square root of 1311031031 is about 36208.1624913499. The cubic root of 1311031031 is about 1094.4711640542.

Adding to 1311031031 its reverse (1301301131), we get a palindrome (2612332162).

The spelling of 1311031031 in words is "one billion, three hundred eleven million, thirty-one thousand, thirty-one".