2110000021 has 4 divisors (see below), whose sum is σ = 2135421792. Its totient is φ = 2084578252.

The previous prime is 2110000003. The next prime is 2110000031. The reversal of 2110000021 is 1200000112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2110000021 - 2¹⁷ = 2109868949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2109999959 and 2110000013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2110000001) 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, 12710761 + ... + 12710926.

It is an arithmetic number, because the mean of its divisors is an integer number (533855448).

Almost surely, 2^2110000021 is an apocalyptic number.

It is an amenable number.

2110000021 is a deficient number, since it is larger than the sum of its proper divisors (25421771).

2110000021 is an equidigital number, since it uses as much as digits as its factorization.

2110000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25421770.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 2110000021 is about 45934.7365400086. The cubic root of 2110000021 is about 1282.6086166395.

Adding to 2110000021 its reverse (1200000112), we get a palindrome (3310000133).

Subtracting from 2110000021 its reverse (1200000112), we obtain a palindrome (909999909).

The spelling of 2110000021 in words is "two billion, one hundred ten million, twenty-one", and thus it is an aban number.