31102311031213 has 2 divisors, whose sum is σ = 31102311031214. Its totient is φ = 31102311031212.

The previous prime is 31102311031201. The next prime is 31102311031247. The reversal of 31102311031213 is 31213011320113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20695247935209 + 10407063096004 = 4549203^2 + 3225998^2 .

It is a cyclic number.

It is not a de Polignac number, because 31102311031213 - 2⁹ = 31102311030701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31102311031013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15551155515606 + 15551155515607.

It is an arithmetic number, because the mean of its divisors is an integer number (15551155515607).

Almost surely, 2^{31102311031213} is an apocalyptic number.

It is an amenable number.

31102311031213 is a deficient number, since it is larger than the sum of its proper divisors (1).

31102311031213 is an equidigital number, since it uses as much as digits as its factorization.

31102311031213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 31102311031213 its reverse (31213011320113), we get a palindrome (62315322351326).

The spelling of 31102311031213 in words is "thirty-one trillion, one hundred two billion, three hundred eleven million, thirty-one thousand, two hundred thirteen".