2112211999 has 4 divisors (see below), whose sum is σ = 2113593160. Its totient is φ = 2110830840.

The previous prime is 2112211967. The next prime is 2112212029. The reversal of 2112211999 is 9991122112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2112211999 - 2⁵ = 2112211967 is a prime.

It is a super-2 number, since 2×2112211999² = 8922879057439152002, 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 (2112211949) 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, 688284 + ... + 691345.

It is an arithmetic number, because the mean of its divisors is an integer number (528398290).

Almost surely, 2^2112211999 is an apocalyptic number.

2112211999 is a deficient number, since it is larger than the sum of its proper divisors (1381161).

2112211999 is a wasteful number, since it uses less digits than its factorization.

2112211999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381160.

The product of its digits is 5832, while the sum is 37.

The square root of 2112211999 is about 45958.8076324876. The cubic root of 2112211999 is about 1283.0566594806.

The spelling of 2112211999 in words is "two billion, one hundred twelve million, two hundred eleven thousand, nine hundred ninety-nine".