213085911942931 has 2 divisors, whose sum is σ = 213085911942932. Its totient is φ = 213085911942930.

The previous prime is 213085911942929. The next prime is 213085911943043. The reversal of 213085911942931 is 139249119580312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213085911942931 - 2¹ = 213085911942929 is a prime.

It is a super-2 number, since 2×213085911942931² (a number of 29 digits) contains 22 as substring.

Together with 213085911942929, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (213085911942131) 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, 106542955971465 + 106542955971466.

It is an arithmetic number, because the mean of its divisors is an integer number (106542955971466).

Almost surely, 2^{213085911942931} is an apocalyptic number.

213085911942931 is a deficient number, since it is larger than the sum of its proper divisors (1).

213085911942931 is an equidigital number, since it uses as much as digits as its factorization.

213085911942931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4199040, while the sum is 58.

The spelling of 213085911942931 in words is "two hundred thirteen trillion, eighty-five billion, nine hundred eleven million, nine hundred forty-two thousand, nine hundred thirty-one".