31013110111213 has 2 divisors, whose sum is σ = 31013110111214. Its totient is φ = 31013110111212.

The previous prime is 31013110111211. The next prime is 31013110111231. The reversal of 31013110111213 is 31211101131013.

Together with next prime (31013110111231) 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., 16242939244009 + 14770170867204 = 4030253^2 + 3843198^2 .

It is a cyclic number.

It is not a de Polignac number, because 31013110111213 - 2¹ = 31013110111211 is a prime.

Together with 31013110111211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31013110111211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15506555055606 + 15506555055607.

It is an arithmetic number, because the mean of its divisors is an integer number (15506555055607).

Almost surely, 2^{31013110111213} is an apocalyptic number.

It is an amenable number.

31013110111213 is a deficient number, since it is larger than the sum of its proper divisors (1).

31013110111213 is an equidigital number, since it uses as much as digits as its factorization.

31013110111213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 19.

Adding to 31013110111213 its reverse (31211101131013), we get a palindrome (62224211242226).

The spelling of 31013110111213 in words is "thirty-one trillion, thirteen billion, one hundred ten million, one hundred eleven thousand, two hundred thirteen".