191200120 has 32 divisors (see below), whose sum is σ = 437497200. Its totient is φ = 75182848.

The previous prime is 191200109. The next prime is 191200147. The reversal of 191200120 is 21002191.

It is a junction number, because it is equal to n+sod(n) for n = 191200094 and 191200103.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 38149 + ... + 42868.

Almost surely, 2^191200120 is an apocalyptic number.

191200120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191200120 is an abundant number, since it is smaller than the sum of its proper divisors (246297080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191200120 is a wasteful number, since it uses less digits than its factorization.

191200120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81087 (or 81083 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 191200120 is about 13827.5131531306. The cubic root of 191200120 is about 576.0975834540.

The spelling of 191200120 in words is "one hundred ninety-one million, two hundred thousand, one hundred twenty".