999922310321 has 4 divisors (see below), whose sum is σ = 1090824338544. Its totient is φ = 909020282100.

The previous prime is 999922310287. The next prime is 999922310381. The reversal of 999922310321 is 123013229999.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999922310321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 999922310321.

It is not an unprimeable number, because it can be changed into a prime (999922310381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45451014095 + ... + 45451014116.

It is an arithmetic number, because the mean of its divisors is an integer number (272706084636).

Almost surely, 2^999922310321 is an apocalyptic number.

It is an amenable number.

999922310321 is a deficient number, since it is larger than the sum of its proper divisors (90902028223).

999922310321 is a wasteful number, since it uses less digits than its factorization.

999922310321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90902028222.

The product of its (nonzero) digits is 472392, while the sum is 50.

The spelling of 999922310321 in words is "nine hundred ninety-nine billion, nine hundred twenty-two million, three hundred ten thousand, three hundred twenty-one".