31301211800213 has 2 divisors, whose sum is σ = 31301211800214. Its totient is φ = 31301211800212.

The previous prime is 31301211800203. The next prime is 31301211800227. The reversal of 31301211800213 is 31200811210313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17191820275204 + 14109391525009 = 4146302^2 + 3756247^2 .

It is a cyclic number.

It is not a de Polignac number, because 31301211800213 - 2¹⁰ = 31301211799189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31301211800203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15650605900106 + 15650605900107.

It is an arithmetic number, because the mean of its divisors is an integer number (15650605900107).

Almost surely, 2^{31301211800213} is an apocalyptic number.

It is an amenable number.

31301211800213 is a deficient number, since it is larger than the sum of its proper divisors (1).

31301211800213 is an equidigital number, since it uses as much as digits as its factorization.

31301211800213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 31301211800213 in words is "thirty-one trillion, three hundred one billion, two hundred eleven million, eight hundred thousand, two hundred thirteen".