213085911942929 has 2 divisors, whose sum is σ = 213085911942930. Its totient is φ = 213085911942928.

The previous prime is 213085911942881. The next prime is 213085911942931. The reversal of 213085911942929 is 929249119580312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124961656890625 + 88124255052304 = 11178625^2 + 9387452^2 .

It is a cyclic number.

It is not a de Polignac number, because 213085911942929 - 2²⁴ = 213085895165713 is a prime.

Together with 213085911942931, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213085911944929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106542955971464 + 106542955971465.

It is an arithmetic number, because the mean of its divisors is an integer number (106542955971465).

Almost surely, 2^{213085911942929} is an apocalyptic number.

It is an amenable number.

213085911942929 is a deficient number, since it is larger than the sum of its proper divisors (1).

213085911942929 is an equidigital number, since it uses as much as digits as its factorization.

213085911942929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25194240, while the sum is 65.

The spelling of 213085911942929 in words is "two hundred thirteen trillion, eighty-five billion, nine hundred eleven million, nine hundred forty-two thousand, nine hundred twenty-nine".