213130330991 has 2 divisors, whose sum is σ = 213130330992. Its totient is φ = 213130330990.

The previous prime is 213130330961. The next prime is 213130331003. The reversal of 213130330991 is 199033031312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213130330991 - 2³⁴ = 195950461807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213130330901) 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, 106565165495 + 106565165496.

It is an arithmetic number, because the mean of its divisors is an integer number (106565165496).

Almost surely, 2^213130330991 is an apocalyptic number.

213130330991 is a deficient number, since it is larger than the sum of its proper divisors (1).

213130330991 is an equidigital number, since it uses as much as digits as its factorization.

213130330991 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 35.

The spelling of 213130330991 in words is "two hundred thirteen billion, one hundred thirty million, three hundred thirty thousand, nine hundred ninety-one".