313121021999 has 8 divisors (see below), whose sum is σ = 342234741888. Its totient is φ = 285195617280.

The previous prime is 313121021989. The next prime is 313121022077. The reversal of 313121021999 is 999120121313.

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

It is a cyclic number.

It is not a de Polignac number, because 313121021999 - 2⁸ = 313121021743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313121021959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297078242 + ... + 297079295.

It is an arithmetic number, because the mean of its divisors is an integer number (42779342736).

Almost surely, 2^313121021999 is an apocalyptic number.

313121021999 is a deficient number, since it is larger than the sum of its proper divisors (29113719889).

313121021999 is a wasteful number, since it uses less digits than its factorization.

313121021999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594157585.

The product of its (nonzero) digits is 26244, while the sum is 41.

The spelling of 313121021999 in words is "three hundred thirteen billion, one hundred twenty-one million, twenty-one thousand, nine hundred ninety-nine".