321202311161 has 2 divisors, whose sum is σ = 321202311162. Its totient is φ = 321202311160.

The previous prime is 321202311139. The next prime is 321202311173. The reversal of 321202311161 is 161113202123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 316901443600 + 4300867561 = 562940^2 + 65581^2 .

It is a cyclic number.

It is not a de Polignac number, because 321202311161 - 2⁶ = 321202311097 is a prime.

It is not a weakly prime, because it can be changed into another prime (321202311121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160601155580 + 160601155581.

It is an arithmetic number, because the mean of its divisors is an integer number (160601155581).

Almost surely, 2^321202311161 is an apocalyptic number.

It is an amenable number.

321202311161 is a deficient number, since it is larger than the sum of its proper divisors (1).

321202311161 is an equidigital number, since it uses as much as digits as its factorization.

321202311161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 321202311161 its reverse (161113202123), we get a palindrome (482315513284).

The spelling of 321202311161 in words is "three hundred twenty-one billion, two hundred two million, three hundred eleven thousand, one hundred sixty-one".