313444121213 has 2 divisors, whose sum is σ = 313444121214. Its totient is φ = 313444121212.

The previous prime is 313444121201. The next prime is 313444121231. The reversal of 313444121213 is 312121444313.

Together with next prime (313444121231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201900144889 + 111543976324 = 449333^2 + 333982^2 .

It is a cyclic number.

It is not a de Polignac number, because 313444121213 - 2⁶ = 313444121149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313444121273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156722060606 + 156722060607.

It is an arithmetic number, because the mean of its divisors is an integer number (156722060607).

Almost surely, 2^313444121213 is an apocalyptic number.

It is an amenable number.

313444121213 is a deficient number, since it is larger than the sum of its proper divisors (1).

313444121213 is an equidigital number, since it uses as much as digits as its factorization.

313444121213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 29.

Adding to 313444121213 its reverse (312121444313), we get a palindrome (625565565526).

The spelling of 313444121213 in words is "three hundred thirteen billion, four hundred forty-four million, one hundred twenty-one thousand, two hundred thirteen".