999111011222 has 8 divisors (see below), whose sum is σ = 1507640568336. Its totient is φ = 496564155112.

The previous prime is 999111011179. The next prime is 999111011231. The reversal of 999111011222 is 222110111999.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1495674833 + ... + 1495675500.

It is an arithmetic number, because the mean of its divisors is an integer number (188455071042).

Almost surely, 2^999111011222 is an apocalyptic number.

999111011222 is a deficient number, since it is larger than the sum of its proper divisors (508529557114).

999111011222 is a wasteful number, since it uses less digits than its factorization.

999111011222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2991350502.

The product of its (nonzero) digits is 5832, while the sum is 38.

The spelling of 999111011222 in words is "nine hundred ninety-nine billion, one hundred eleven million, eleven thousand, two hundred twenty-two".