231221320332323 has 2 divisors, whose sum is σ = 231221320332324. Its totient is φ = 231221320332322.

The previous prime is 231221320332283. The next prime is 231221320332371. The reversal of 231221320332323 is 323233023122132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231221320332323 - 2¹⁶ = 231221320266787 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231221320332323.

It is not a weakly prime, because it can be changed into another prime (231221320392323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115610660166161 + 115610660166162.

It is an arithmetic number, because the mean of its divisors is an integer number (115610660166162).

Almost surely, 2^{231221320332323} is an apocalyptic number.

231221320332323 is a deficient number, since it is larger than the sum of its proper divisors (1).

231221320332323 is an equidigital number, since it uses as much as digits as its factorization.

231221320332323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 32.

Adding to 231221320332323 its reverse (323233023122132), we get a palindrome (554454343454455).

The spelling of 231221320332323 in words is "two hundred thirty-one trillion, two hundred twenty-one billion, three hundred twenty million, three hundred thirty-two thousand, three hundred twenty-three".