12001199 has 4 divisors (see below), whose sum is σ = 13715664. Its totient is φ = 10286736.

The previous prime is 12001189. The next prime is 12001207. The reversal of 12001199 is 99110021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99110021 = 5087 ⋅19483.

It is a cyclic number.

It is not a de Polignac number, because 12001199 - 2¹⁶ = 11935663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001109) 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 3 ways as a sum of consecutive naturals, for example, 857222 + ... + 857235.

It is an arithmetic number, because the mean of its divisors is an integer number (3428916).

Almost surely, 2^12001199 is an apocalyptic number.

12001199 is a deficient number, since it is larger than the sum of its proper divisors (1714465).

12001199 is an equidigital number, since it uses as much as digits as its factorization.

12001199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714464.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 12001199 is about 3464.2746715582. The cubic root of 12001199 is about 228.9504733255.

The spelling of 12001199 in words is "twelve million, one thousand, one hundred ninety-nine".