31103313312133 has 2 divisors, whose sum is σ = 31103313312134. Its totient is φ = 31103313312132.

The previous prime is 31103313312131. The next prime is 31103313312143. The reversal of 31103313312133 is 33121331330113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21117315148164 + 9985998163969 = 4595358^2 + 3160063^2 .

It is a cyclic number.

It is not a de Polignac number, because 31103313312133 - 2¹ = 31103313312131 is a prime.

Together with 31103313312131, 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 (31103313312131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15551656656066 + 15551656656067.

It is an arithmetic number, because the mean of its divisors is an integer number (15551656656067).

Almost surely, 2^{31103313312133} is an apocalyptic number.

It is an amenable number.

31103313312133 is a deficient number, since it is larger than the sum of its proper divisors (1).

31103313312133 is an equidigital number, since it uses as much as digits as its factorization.

31103313312133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 28.

Adding to 31103313312133 its reverse (33121331330113), we get a palindrome (64224644642246).

The spelling of 31103313312133 in words is "thirty-one trillion, one hundred three billion, three hundred thirteen million, three hundred twelve thousand, one hundred thirty-three".