999213023013221 has 8 divisors (see below), whose sum is σ = 1051803481846080. Its totient is φ = 946622594153088.

The previous prime is 999213023013193. The next prime is 999213023013239. The reversal of 999213023013221 is 122310320312999.

999213023013221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 999213023013221 - 2⁶ = 999213023013157 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 (999213023013521) 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, 101844245 + ... + 111223541.

It is an arithmetic number, because the mean of its divisors is an integer number (131475435230760).

Almost surely, 2^{999213023013221} is an apocalyptic number.

It is an amenable number.

999213023013221 is a deficient number, since it is larger than the sum of its proper divisors (52590458832859).

999213023013221 is a wasteful number, since it uses less digits than its factorization.

999213023013221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14986363.

The product of its (nonzero) digits is 314928, while the sum is 47.

The spelling of 999213023013221 in words is "nine hundred ninety-nine trillion, two hundred thirteen billion, twenty-three million, thirteen thousand, two hundred twenty-one".