312221021986 has 8 divisors (see below), whose sum is σ = 471135913920. Its totient is φ = 155175717348.

The previous prime is 312221021971. The next prime is 312221022013. The reversal of 312221021986 is 689120122213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467396406 + ... + 467397073.

It is an arithmetic number, because the mean of its divisors is an integer number (58891989240).

Almost surely, 2^312221021986 is an apocalyptic number.

312221021986 is a deficient number, since it is larger than the sum of its proper divisors (158914891934).

312221021986 is a wasteful number, since it uses less digits than its factorization.

312221021986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934793648.

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 312221021986 in words is "three hundred twelve billion, two hundred twenty-one million, twenty-one thousand, nine hundred eighty-six".