2212123209 has 8 divisors (see below), whose sum is σ = 2949760032. Its totient is φ = 1474617600.

The previous prime is 2212123201. The next prime is 2212123217. The reversal of 2212123209 is 9023212122.

It is an interprime number because it is at equal distance from previous prime (2212123201) and next prime (2212123217).

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

It is not a de Polignac number, because 2212123209 - 2³ = 2212123201 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2212123201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17602 + ... + 68804.

It is an arithmetic number, because the mean of its divisors is an integer number (368720004).

Almost surely, 2^2212123209 is an apocalyptic number.

It is an amenable number.

2212123209 is a deficient number, since it is larger than the sum of its proper divisors (737636823).

2212123209 is a wasteful number, since it uses less digits than its factorization.

2212123209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65607.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 2212123209 is about 47033.2138918871. The cubic root of 2212123209 is about 1302.9760632204.

The spelling of 2212123209 in words is "two billion, two hundred twelve million, one hundred twenty-three thousand, two hundred nine".