199010121 has 8 divisors (see below), whose sum is σ = 269697024. Its totient is φ = 130498320.

The previous prime is 199010117. The next prime is 199010131. The reversal of 199010121 is 121010991.

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

It is not a de Polignac number, because 199010121 - 2² = 199010117 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 199010091 and 199010100.

It is not an unprimeable number, because it can be changed into a prime (199010131) 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, 543561 + ... + 543926.

It is an arithmetic number, because the mean of its divisors is an integer number (33712128).

Almost surely, 2^199010121 is an apocalyptic number.

It is an amenable number.

199010121 is a deficient number, since it is larger than the sum of its proper divisors (70686903).

199010121 is a wasteful number, since it uses less digits than its factorization.

199010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087551.

The product of its (nonzero) digits is 162, while the sum is 24.

The square root of 199010121 is about 14107.0947044386. The cubic root of 199010121 is about 583.8371435946.

The spelling of 199010121 in words is "one hundred ninety-nine million, ten thousand, one hundred twenty-one".