1210312431313 has 4 divisors (see below), whose sum is σ = 1212353430948. Its totient is φ = 1208271431680.

The previous prime is 1210312431259. The next prime is 1210312431457. The reversal of 1210312431313 is 3131342130121.

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 1015564093504 + 194748337809 = 1007752^2 + 441303^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210312431313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1210312434313) 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, 1020498928 + ... + 1020500113.

It is an arithmetic number, because the mean of its divisors is an integer number (303088357737).

Almost surely, 2^{1210312431313} is an apocalyptic number.

It is an amenable number.

1210312431313 is a deficient number, since it is larger than the sum of its proper divisors (2040999635).

1210312431313 is an equidigital number, since it uses as much as digits as its factorization.

1210312431313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040999634.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 1210312431313 its reverse (3131342130121), we get a palindrome (4341654561434).

The spelling of 1210312431313 in words is "one trillion, two hundred ten billion, three hundred twelve million, four hundred thirty-one thousand, three hundred thirteen".