1312210013 has 4 divisors (see below), whose sum is σ = 1312627260. Its totient is φ = 1311792768.

The previous prime is 1312209971. The next prime is 1312210027. The reversal of 1312210013 is 3100122131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1065500164 + 246709849 = 32642^2 + 15707^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312210013 - 2⁶ = 1312209949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1312210013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312210073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203870 + ... + 210207.

It is an arithmetic number, because the mean of its divisors is an integer number (328156815).

Almost surely, 2^1312210013 is an apocalyptic number.

It is an amenable number.

1312210013 is a deficient number, since it is larger than the sum of its proper divisors (417247).

1312210013 is an equidigital number, since it uses as much as digits as its factorization.

1312210013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417246.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1312210013 is about 36224.4394435580. The cubic root of 1312210013 is about 1094.7991438824.

Adding to 1312210013 its reverse (3100122131), we get a palindrome (4412332144).

The spelling of 1312210013 in words is "one billion, three hundred twelve million, two hundred ten thousand, thirteen".