12199121 has 8 divisors (see below), whose sum is σ = 14008800.
Its totient is φ = 10506240.
The previous prime is 12199097. The next prime is 12199133.
12199121 is nontrivially palindromic in base 10.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 12199121 - 222 = 8004817 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (12199021) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28976 + ... + 29393.
It is an arithmetic number, because the mean of its divisors is an integer number (1751100).
Almost surely, 212199121 is an apocalyptic number.
12199121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.
It is an amenable number.
12199121 is a deficient number, since it is larger than the sum of its proper divisors (1809679).
12199121 is a wasteful number, since it uses less digits than its factorization.
12199121 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 58399.
The product of its digits is 324, while the sum is 26.
The square root of 12199121 is about 3492.7240085641.
The cubic root of 12199121 is about 230.2022229036.
The spelling of 12199121 in words is "twelve million, one hundred ninety-nine thousand, one hundred twenty-one".