1312243113 has 32 divisors (see below), whose sum is σ = 1916006400. Its totient is φ = 795787200.

The previous prime is 1312243111. The next prime is 1312243117. The reversal of 1312243113 is 3113422131.

It is not a de Polignac number, because 1312243113 - 2¹ = 1312243111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1312243113.

It is not an unprimeable number, because it can be changed into a prime (1312243111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 228643 + ... + 234311.

It is an arithmetic number, because the mean of its divisors is an integer number (59875200).

Almost surely, 2^1312243113 is an apocalyptic number.

It is an amenable number.

1312243113 is a deficient number, since it is larger than the sum of its proper divisors (603763287).

1312243113 is a wasteful number, since it uses less digits than its factorization.

1312243113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5853.

The product of its digits is 432, while the sum is 21.

The square root of 1312243113 is about 36224.8963145514. The cubic root of 1312243113 is about 1094.8083491027.

Adding to 1312243113 its reverse (3113422131), we get a palindrome (4425665244).

The spelling of 1312243113 in words is "one billion, three hundred twelve million, two hundred forty-three thousand, one hundred thirteen".