213130131323321 has 2 divisors, whose sum is σ = 213130131323322. Its totient is φ = 213130131323320.

The previous prime is 213130131323299. The next prime is 213130131323381. The reversal of 213130131323321 is 123323131031312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189894463248400 + 23235668074921 = 13780220^2 + 4820339^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213130131323321 is a prime.

It is not a weakly prime, because it can be changed into another prime (213130131323381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106565065661660 + 106565065661661.

It is an arithmetic number, because the mean of its divisors is an integer number (106565065661661).

Almost surely, 2^{213130131323321} is an apocalyptic number.

It is an amenable number.

213130131323321 is a deficient number, since it is larger than the sum of its proper divisors (1).

213130131323321 is an equidigital number, since it uses as much as digits as its factorization.

213130131323321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 29.

Adding to 213130131323321 its reverse (123323131031312), we get a palindrome (336453262354633).

The spelling of 213130131323321 in words is "two hundred thirteen trillion, one hundred thirty billion, one hundred thirty-one million, three hundred twenty-three thousand, three hundred twenty-one".