321212111331 has 16 divisors (see below), whose sum is σ = 429393015680. Its totient is φ = 213586865280.

The previous prime is 321212111317. The next prime is 321212111359. The reversal of 321212111331 is 133111212123.

It is not a de Polignac number, because 321212111331 - 2⁷ = 321212111203 is a prime.

It is a super-2 number, since 2×321212111331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321212111298 and 321212111307.

It is not an unprimeable number, because it can be changed into a prime (321212111371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2267496 + ... + 2404986.

It is an arithmetic number, because the mean of its divisors is an integer number (26837063480).

Almost surely, 2^321212111331 is an apocalyptic number.

321212111331 is a deficient number, since it is larger than the sum of its proper divisors (108180904349).

321212111331 is a wasteful number, since it uses less digits than its factorization.

321212111331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139506.

The product of its digits is 216, while the sum is 21.

Adding to 321212111331 its reverse (133111212123), we get a palindrome (454323323454).

The spelling of 321212111331 in words is "three hundred twenty-one billion, two hundred twelve million, one hundred eleven thousand, three hundred thirty-one".