321120021163 has 2 divisors, whose sum is σ = 321120021164. Its totient is φ = 321120021162.

The previous prime is 321120021139. The next prime is 321120021217. The reversal of 321120021163 is 361120021123.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321120021163 - 2²⁵ = 321086466731 is a prime.

It is not a weakly prime, because it can be changed into another prime (321120021113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160560010581 + 160560010582.

It is an arithmetic number, because the mean of its divisors is an integer number (160560010582).

Almost surely, 2^321120021163 is an apocalyptic number.

321120021163 is a deficient number, since it is larger than the sum of its proper divisors (1).

321120021163 is an equidigital number, since it uses as much as digits as its factorization.

321120021163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 321120021163 its reverse (361120021123), we get a palindrome (682240042286).

The spelling of 321120021163 in words is "three hundred twenty-one billion, one hundred twenty million, twenty-one thousand, one hundred sixty-three".