312123321100 has 36 divisors (see below), whose sum is σ = 680711206000. Its totient is φ = 124221936960.

The previous prime is 312123321091. The next prime is 312123321121. The reversal of 312123321100 is 1123321213.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 7822395 + ... + 7862194.

Almost surely, 2^312123321100 is an apocalyptic number.

It is an amenable number.

312123321100 is an abundant number, since it is smaller than the sum of its proper divisors (368587884900).

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

312123321100 is a wasteful number, since it uses less digits than its factorization.

312123321100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15684802 (or 15684795 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 312123321100 its reverse (1123321213), we get a palindrome (313246642313).

The spelling of 312123321100 in words is "three hundred twelve billion, one hundred twenty-three million, three hundred twenty-one thousand, one hundred".