999993313221 has 32 divisors (see below), whose sum is σ = 1559811314688. Its totient is φ = 557930056320.

The previous prime is 999993313217. The next prime is 999993313261. The reversal of 999993313221 is 122313399999.

It is not a de Polignac number, because 999993313221 - 2² = 999993313217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999993313261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2263345 + ... + 2668841.

It is an arithmetic number, because the mean of its divisors is an integer number (48744103584).

Almost surely, 2^999993313221 is an apocalyptic number.

It is an amenable number.

999993313221 is a deficient number, since it is larger than the sum of its proper divisors (559818001467).

999993313221 is a wasteful number, since it uses less digits than its factorization.

999993313221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408281.

The product of its digits is 6377292, while the sum is 60.

The spelling of 999993313221 in words is "nine hundred ninety-nine billion, nine hundred ninety-three million, three hundred thirteen thousand, two hundred twenty-one".