1312111310 has 32 divisors (see below), whose sum is σ = 2516088960. Its totient is φ = 491224608.

The previous prime is 1312111309. The next prime is 1312111319. The reversal of 1312111310 is 131112131.

It is a happy number.

It is a super-2 number, since 2×1312111310² = 3443272179659832200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312111319) 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, 25832 + ... + 57371.

It is an arithmetic number, because the mean of its divisors is an integer number (78627780).

Almost surely, 2^1312111310 is an apocalyptic number.

1312111310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1312111310 is a deficient number, since it is larger than the sum of its proper divisors (1203977650).

1312111310 is a wasteful number, since it uses less digits than its factorization.

1312111310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83312.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1312111310 is about 36223.0770366075. The cubic root of 1312111310 is about 1094.7716933299.

Adding to 1312111310 its reverse (131112131), we get a palindrome (1443223441).

The spelling of 1312111310 in words is "one billion, three hundred twelve million, one hundred eleven thousand, three hundred ten".