213130131323381 has 2 divisors, whose sum is σ = 213130131323382. Its totient is φ = 213130131323380.

The previous prime is 213130131323321. The next prime is 213130131323393. The reversal of 213130131323381 is 183323131031312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211201549200625 + 1928582122756 = 14532775^2 + 1388734^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213130131323381 is a prime.

It is a super-2 number, since 2×213130131323381² (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 (213130131323321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106565065661690 + 106565065661691.

It is an arithmetic number, because the mean of its divisors is an integer number (106565065661691).

Almost surely, 2^{213130131323381} is an apocalyptic number.

It is an amenable number.

213130131323381 is a deficient number, since it is larger than the sum of its proper divisors (1).

213130131323381 is an equidigital number, since it uses as much as digits as its factorization.

213130131323381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 35.

Adding to 213130131323381 its reverse (183323131031312), we get a palindrome (396453262354693).

The spelling of 213130131323381 in words is "two hundred thirteen trillion, one hundred thirty billion, one hundred thirty-one million, three hundred twenty-three thousand, three hundred eighty-one".