213130308134981 has 2 divisors, whose sum is σ = 213130308134982. Its totient is φ = 213130308134980.

The previous prime is 213130308134911. The next prime is 213130308135001. The reversal of 213130308134981 is 189431803031312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109554216244225 + 103576091890756 = 10466815^2 + 10177234^2 .

It is a cyclic number.

It is not a de Polignac number, because 213130308134981 - 2³⁰ = 213129234393157 is a prime.

It is a super-2 number, since 2×213130308134981² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213130308134911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106565154067490 + 106565154067491.

It is an arithmetic number, because the mean of its divisors is an integer number (106565154067491).

Almost surely, 2^{213130308134981} is an apocalyptic number.

It is an amenable number.

213130308134981 is a deficient number, since it is larger than the sum of its proper divisors (1).

213130308134981 is an equidigital number, since it uses as much as digits as its factorization.

213130308134981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 47.

The spelling of 213130308134981 in words is "two hundred thirteen trillion, one hundred thirty billion, three hundred eight million, one hundred thirty-four thousand, nine hundred eighty-one".