101995120 has 20 divisors (see below), whose sum is σ = 237138840. Its totient is φ = 40798016.

The previous prime is 101995081. The next prime is 101995141. The reversal of 101995120 is 21599101.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637390 + ... + 637549.

It is an arithmetic number, because the mean of its divisors is an integer number (11856942).

Almost surely, 2^101995120 is an apocalyptic number.

101995120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101995120 is an abundant number, since it is smaller than the sum of its proper divisors (135143720).

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

101995120 is a wasteful number, since it uses less digits than its factorization.

101995120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274952 (or 1274946 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 28.

The square root of 101995120 is about 10099.2633394718. The cubic root of 101995120 is about 467.2254214212.

The spelling of 101995120 in words is "one hundred one million, nine hundred ninety-five thousand, one hundred twenty".