199226121 has 4 divisors (see below), whose sum is σ = 265634832. Its totient is φ = 132817412.

The previous prime is 199226117. The next prime is 199226129. The reversal of 199226121 is 121622991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 199226121 - 2² = 199226117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199226129) 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, 33204351 + ... + 33204356.

It is an arithmetic number, because the mean of its divisors is an integer number (66408708).

Almost surely, 2^199226121 is an apocalyptic number.

It is an amenable number.

199226121 is a deficient number, since it is larger than the sum of its proper divisors (66408711).

199226121 is an equidigital number, since it uses as much as digits as its factorization.

199226121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66408710.

The product of its digits is 3888, while the sum is 33.

The square root of 199226121 is about 14114.7483505729. The cubic root of 199226121 is about 584.0482940374.

The spelling of 199226121 in words is "one hundred ninety-nine million, two hundred twenty-six thousand, one hundred twenty-one".