1311012031 has 16 divisors (see below), whose sum is σ = 1549578240. Its totient is φ = 1085872320.

The previous prime is 1311012007. The next prime is 1311012071. The reversal of 1311012031 is 1302101131.

It is a cyclic number.

It is not a de Polignac number, because 1311012031 - 2²¹ = 1308914879 is a prime.

It is a super-2 number, since 2×1311012031² = 3437505090853489922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311012071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 771 + ... + 51211.

It is an arithmetic number, because the mean of its divisors is an integer number (96848640).

Almost surely, 2^1311012031 is an apocalyptic number.

1311012031 is a deficient number, since it is larger than the sum of its proper divisors (238566209).

1311012031 is an equidigital number, since it uses as much as digits as its factorization.

1311012031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50574.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1311012031 is about 36207.9001186205. The cubic root of 1311012031 is about 1094.4658768535.

Adding to 1311012031 its reverse (1302101131), we get a palindrome (2613113162).

The spelling of 1311012031 in words is "one billion, three hundred eleven million, twelve thousand, thirty-one".