312220109394 has 24 divisors (see below), whose sum is σ = 683044644672. Its totient is φ = 103062948120.

The previous prime is 312220109387. The next prime is 312220109417. The reversal of 312220109394 is 493901022213.

312220109394 is a `hidden beast` number, since 31 + 2 + 220 + 10 + 9 + 394 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84199902 + ... + 84203609.

It is an arithmetic number, because the mean of its divisors is an integer number (28460193528).

Almost surely, 2^312220109394 is an apocalyptic number.

312220109394 is an abundant number, since it is smaller than the sum of its proper divisors (370824535278).

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

312220109394 is a wasteful number, since it uses less digits than its factorization.

312220109394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168403622 (or 168403619 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The spelling of 312220109394 in words is "three hundred twelve billion, two hundred twenty million, one hundred nine thousand, three hundred ninety-four".