321223201231 has 2 divisors, whose sum is σ = 321223201232. Its totient is φ = 321223201230.

The previous prime is 321223201223. The next prime is 321223201253. The reversal of 321223201231 is 132102322123.

It is an a-pointer prime, because the next prime (321223201253) can be obtained adding 321223201231 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321223201231 - 2³ = 321223201223 is a prime.

It is a super-2 number, since 2×321223201231² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321223205231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160611600615 + 160611600616.

It is an arithmetic number, because the mean of its divisors is an integer number (160611600616).

Almost surely, 2^321223201231 is an apocalyptic number.

321223201231 is a deficient number, since it is larger than the sum of its proper divisors (1).

321223201231 is an equidigital number, since it uses as much as digits as its factorization.

321223201231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 321223201231 its reverse (132102322123), we get a palindrome (453325523354).

The spelling of 321223201231 in words is "three hundred twenty-one billion, two hundred twenty-three million, two hundred one thousand, two hundred thirty-one".