2101200023 has 4 divisors (see below), whose sum is σ = 2262830808. Its totient is φ = 1939569240.

The previous prime is 2101200019. The next prime is 2101200037. The reversal of 2101200023 is 3200021012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2101200023 - 2² = 2101200019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101199977 and 2101200013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101200043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80815373 + ... + 80815398.

It is an arithmetic number, because the mean of its divisors is an integer number (565707702).

Almost surely, 2^2101200023 is an apocalyptic number.

2101200023 is a deficient number, since it is larger than the sum of its proper divisors (161630785).

2101200023 is a wasteful number, since it uses less digits than its factorization.

2101200023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161630784.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2101200023 is about 45838.8484039466. The cubic root of 2101200023 is about 1280.8230430556.

Adding to 2101200023 its reverse (3200021012), we get a palindrome (5301221035).

The spelling of 2101200023 in words is "two billion, one hundred one million, two hundred thousand, twenty-three".