31130103011213 has 2 divisors, whose sum is σ = 31130103011214. Its totient is φ = 31130103011212.

The previous prime is 31130103011167. The next prime is 31130103011233. The reversal of 31130103011213 is 31211030103113.

It is an a-pointer prime, because the next prime (31130103011233) can be obtained adding 31130103011213 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16427157559849 + 14702945451364 = 4053043^2 + 3834442^2 .

It is a cyclic number.

It is not a de Polignac number, because 31130103011213 - 2¹² = 31130103007117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31130103011233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15565051505606 + 15565051505607.

It is an arithmetic number, because the mean of its divisors is an integer number (15565051505607).

Almost surely, 2^{31130103011213} is an apocalyptic number.

It is an amenable number.

31130103011213 is a deficient number, since it is larger than the sum of its proper divisors (1).

31130103011213 is an equidigital number, since it uses as much as digits as its factorization.

31130103011213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 31130103011213 its reverse (31211030103113), we get a palindrome (62341133114326).

The spelling of 31130103011213 in words is "thirty-one trillion, one hundred thirty billion, one hundred three million, eleven thousand, two hundred thirteen".