31210011013 has 2 divisors, whose sum is σ = 31210011014. Its totient is φ = 31210011012.

The previous prime is 31210010959. The next prime is 31210011031. The reversal of 31210011013 is 31011001213.

Together with next prime (31210011031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23206561569 + 8003449444 = 152337^2 + 89462^2 .

It is a cyclic number.

It is not a de Polignac number, because 31210011013 - 2²¹ = 31207913861 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31210010984 and 31210011002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31210012013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15605005506 + 15605005507.

It is an arithmetic number, because the mean of its divisors is an integer number (15605005507).

Almost surely, 2^31210011013 is an apocalyptic number.

It is an amenable number.

31210011013 is a deficient number, since it is larger than the sum of its proper divisors (1).

31210011013 is an equidigital number, since it uses as much as digits as its factorization.

31210011013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 31210011013 its reverse (31011001213), we get a palindrome (62221012226).

The spelling of 31210011013 in words is "thirty-one billion, two hundred ten million, eleven thousand, thirteen".