321212333312 has 72 divisors (see below), whose sum is σ = 731107923336. Its totient is φ = 139531124736.

The previous prime is 321212333297. The next prime is 321212333327. The reversal of 321212333312 is 213333212123.

It is an interprime number because it is at equal distance from previous prime (321212333297) and next prime (321212333327).

It can be written as a sum of positive squares in 4 ways, for example, as 8793938176 + 312418395136 = 93776^2 + 558944^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 2782193 + ... + 2895344.

It is an arithmetic number, because the mean of its divisors is an integer number (10154276713).

Almost surely, 2^321212333312 is an apocalyptic number.

321212333312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

321212333312 is an abundant number, since it is smaller than the sum of its proper divisors (409895590024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321212333312 is a wasteful number, since it uses less digits than its factorization.

321212333312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5677583 (or 5677569 counting only the distinct ones).

The product of its digits is 3888, while the sum is 26.

Adding to 321212333312 its reverse (213333212123), we get a palindrome (534545545435).

The spelling of 321212333312 in words is "three hundred twenty-one billion, two hundred twelve million, three hundred thirty-three thousand, three hundred twelve".