31213301313193 has 2 divisors, whose sum is σ = 31213301313194. Its totient is φ = 31213301313192.

The previous prime is 31213301313191. The next prime is 31213301313223. The reversal of 31213301313193 is 39131310331213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23099673788944 + 8113627524249 = 4806212^2 + 2848443^2 .

It is a cyclic number.

It is not a de Polignac number, because 31213301313193 - 2¹ = 31213301313191 is a prime.

Together with 31213301313191, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31213301313191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606650656596 + 15606650656597.

It is an arithmetic number, because the mean of its divisors is an integer number (15606650656597).

Almost surely, 2^{31213301313193} is an apocalyptic number.

It is an amenable number.

31213301313193 is a deficient number, since it is larger than the sum of its proper divisors (1).

31213301313193 is an equidigital number, since it uses as much as digits as its factorization.

31213301313193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13122, while the sum is 34.

The spelling of 31213301313193 in words is "thirty-one trillion, two hundred thirteen billion, three hundred one million, three hundred thirteen thousand, one hundred ninety-three".