999221233112 has 16 divisors (see below), whose sum is σ = 1873796676360. Its totient is φ = 499542119424.

The previous prime is 999221233111. The next prime is 999221233159. The reversal of 999221233112 is 211332122999.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999221233111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8500118 + ... + 8616869.

Almost surely, 2^999221233112 is an apocalyptic number.

It is an amenable number.

999221233112 is a deficient number, since it is larger than the sum of its proper divisors (874575443248).

999221233112 is a wasteful number, since it uses less digits than its factorization.

999221233112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17124290 (or 17124286 counting only the distinct ones).

The product of its digits is 104976, while the sum is 44.

The spelling of 999221233112 in words is "nine hundred ninety-nine billion, two hundred twenty-one million, two hundred thirty-three thousand, one hundred twelve".