2101842120 has 128 divisors (see below), whose sum is σ = 7519703040. Its totient is φ = 459528960.

The previous prime is 2101842089. The next prime is 2101842121. The reversal of 2101842120 is 212481012.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (2101842121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35076 + ... + 73715.

It is an arithmetic number, because the mean of its divisors is an integer number (58747680).

Almost surely, 2^2101842120 is an apocalyptic number.

2101842120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101842120 is an abundant number, since it is smaller than the sum of its proper divisors (5417860920).

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

2101842120 is a wasteful number, since it uses less digits than its factorization.

2101842120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108835 (or 108831 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 2101842120 is about 45845.8517207391. The cubic root of 2101842120 is about 1280.9534969020.

The spelling of 2101842120 in words is "two billion, one hundred one million, eight hundred forty-two thousand, one hundred twenty".