321214031231 has 2 divisors, whose sum is σ = 321214031232. Its totient is φ = 321214031230.

The previous prime is 321214031219. The next prime is 321214031267. The reversal of 321214031231 is 132130412123.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321214031231 is a prime.

It is a super-2 number, since 2×321214031231² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 321214031197 and 321214031206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321214031431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160607015615 + 160607015616.

It is an arithmetic number, because the mean of its divisors is an integer number (160607015616).

Almost surely, 2^321214031231 is an apocalyptic number.

321214031231 is a deficient number, since it is larger than the sum of its proper divisors (1).

321214031231 is an equidigital number, since it uses as much as digits as its factorization.

321214031231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 321214031231 its reverse (132130412123), we get a palindrome (453344443354).

The spelling of 321214031231 in words is "three hundred twenty-one billion, two hundred fourteen million, thirty-one thousand, two hundred thirty-one".