321212031312231 has 16 divisors (see below), whose sum is σ = 475894837757920. Its totient is φ = 214130031425280.

The previous prime is 321212031312209. The next prime is 321212031312269. The reversal of 321212031312231 is 132213130212123.

321212031312231 is a `hidden beast` number, since 3 + 2 + 1 + 2 + 120 + 313 + 1 + 223 + 1 = 666.

It is not a de Polignac number, because 321212031312231 - 2³¹ = 321209883828583 is a prime.

It is a super-2 number, since 2×321212031312231² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321212031312195 and 321212031312204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321212031362231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 314001640 + ... + 315022941.

It is an arithmetic number, because the mean of its divisors is an integer number (29743427359870).

Almost surely, 2^{321212031312231} is an apocalyptic number.

321212031312231 is a deficient number, since it is larger than the sum of its proper divisors (154682806445689).

321212031312231 is a wasteful number, since it uses less digits than its factorization.

321212031312231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629043503 (or 629043497 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 321212031312231 its reverse (132213130212123), we get a palindrome (453425161524354).

The spelling of 321212031312231 in words is "three hundred twenty-one trillion, two hundred twelve billion, thirty-one million, three hundred twelve thousand, two hundred thirty-one".