191020120 has 16 divisors (see below), whose sum is σ = 429795360. Its totient is φ = 76408032.

The previous prime is 191020117. The next prime is 191020127. The reversal of 191020120 is 21020191.

191020120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 191020094 and 191020103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191020127) 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, 2387712 + ... + 2387791.

It is an arithmetic number, because the mean of its divisors is an integer number (26862210).

Almost surely, 2^191020120 is an apocalyptic number.

191020120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191020120 is an abundant number, since it is smaller than the sum of its proper divisors (238775240).

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

191020120 is a wasteful number, since it uses less digits than its factorization.

191020120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4775514 (or 4775510 counting only the distinct ones).

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

The square root of 191020120 is about 13821.0028579695. The cubic root of 191020120 is about 575.9167430461.

The spelling of 191020120 in words is "one hundred ninety-one million, twenty thousand, one hundred twenty".