999112211 has 2 divisors, whose sum is σ = 999112212. Its totient is φ = 999112210.

The previous prime is 999112193. The next prime is 999112259. The reversal of 999112211 is 112211999.

It is a weak prime.

It is an emirp because it is prime and its reverse (112211999) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999112211 is a prime.

It is equal to p_50804927 and since 999112211 and 50804927 have the same sum of digits, it is a Honaker prime.

It is a zygodrome in base 10.

It is not a weakly prime, because it can be changed into another prime (999112711) 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 as a sum of consecutive naturals, namely, 499556105 + 499556106.

It is an arithmetic number, because the mean of its divisors is an integer number (499556106).

Almost surely, 2^999112211 is an apocalyptic number.

999112211 is a deficient number, since it is larger than the sum of its proper divisors (1).

999112211 is an equidigital number, since it uses as much as digits as its factorization.

999112211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2916, while the sum is 35.

The square root of 999112211 is about 31608.7363081791. The cubic root of 999112211 is about 999.7039827157.

The spelling of 999112211 in words is "nine hundred ninety-nine million, one hundred twelve thousand, two hundred eleven".