2112212999 has 16 divisors (see below), whose sum is σ = 2355998400. Its totient is φ = 1880207616.

The previous prime is 2112212987. The next prime is 2112213007. The reversal of 2112212999 is 9992122112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2112212999 - 2⁴ = 2112212983 is a prime.

It is a super-2 number, since 2×2112212999² = 8922887506289148002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112212909) 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 15 ways as a sum of consecutive naturals, for example, 356342 + ... + 362220.

It is an arithmetic number, because the mean of its divisors is an integer number (147249900).

Almost surely, 2^2112212999 is an apocalyptic number.

2112212999 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2112212999 is a deficient number, since it is larger than the sum of its proper divisors (243785401).

2112212999 is a wasteful number, since it uses less digits than its factorization.

2112212999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6874.

The product of its digits is 11664, while the sum is 38.

The square root of 2112212999 is about 45958.8185117938. The cubic root of 2112212999 is about 1283.0568619629.

The spelling of 2112212999 in words is "two billion, one hundred twelve million, two hundred twelve thousand, nine hundred ninety-nine".