312123221332 has 24 divisors (see below), whose sum is σ = 588263436936. Its totient is φ = 144049227648.

The previous prime is 312123221321. The next prime is 312123221359. The reversal of 312123221332 is 233122321213.

It can be written as a sum of positive squares in 4 ways, for example, as 975687696 + 311147533636 = 31236^2 + 557806^2 .

It is a junction number, because it is equal to n+sod(n) for n = 312123221297 and 312123221306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 896898 + ... + 1195270.

It is an arithmetic number, because the mean of its divisors is an integer number (24510976539).

Almost surely, 2^312123221332 is an apocalyptic number.

It is an amenable number.

312123221332 is a deficient number, since it is larger than the sum of its proper divisors (276140215604).

312123221332 is a wasteful number, since it uses less digits than its factorization.

312123221332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318507 (or 318505 counting only the distinct ones).

The product of its digits is 2592, while the sum is 25.

Adding to 312123221332 its reverse (233122321213), we get a palindrome (545245542545).

The spelling of 312123221332 in words is "three hundred twelve billion, one hundred twenty-three million, two hundred twenty-one thousand, three hundred thirty-two".