213311320091 has 2 divisors, whose sum is σ = 213311320092. Its totient is φ = 213311320090.

The previous prime is 213311320031. The next prime is 213311320111. The reversal of 213311320091 is 190023113312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213311320091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213311320091.

It is not a weakly prime, because it can be changed into another prime (213311320031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106655660045 + 106655660046.

It is an arithmetic number, because the mean of its divisors is an integer number (106655660046).

Almost surely, 2^213311320091 is an apocalyptic number.

213311320091 is a deficient number, since it is larger than the sum of its proper divisors (1).

213311320091 is an equidigital number, since it uses as much as digits as its factorization.

213311320091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 26.

The spelling of 213311320091 in words is "two hundred thirteen billion, three hundred eleven million, three hundred twenty thousand, ninety-one".