213041322161 has 2 divisors, whose sum is σ = 213041322162. Its totient is φ = 213041322160.

The previous prime is 213041322079. The next prime is 213041322223. The reversal of 213041322161 is 161223140312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125695066225 + 87346255936 = 354535^2 + 295544^2 .

It is a cyclic number.

It is not a de Polignac number, because 213041322161 - 2²² = 213037127857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213041322161.

It is not a weakly prime, because it can be changed into another prime (213041324161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106520661080 + 106520661081.

It is an arithmetic number, because the mean of its divisors is an integer number (106520661081).

Almost surely, 2^213041322161 is an apocalyptic number.

It is an amenable number.

213041322161 is a deficient number, since it is larger than the sum of its proper divisors (1).

213041322161 is an equidigital number, since it uses as much as digits as its factorization.

213041322161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 213041322161 its reverse (161223140312), we get a palindrome (374264462473).

The spelling of 213041322161 in words is "two hundred thirteen billion, forty-one million, three hundred twenty-two thousand, one hundred sixty-one".