2021112003 has 4 divisors (see below), whose sum is σ = 2694816008. Its totient is φ = 1347408000.

The previous prime is 2021111999. The next prime is 2021112047. The reversal of 2021112003 is 3002111202.

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

It is not a de Polignac number, because 2021112003 - 2² = 2021111999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2021112003.

It is not an unprimeable number, because it can be changed into a prime (2021112103) 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, 336851998 + ... + 336852003.

It is an arithmetic number, because the mean of its divisors is an integer number (673704002).

Almost surely, 2^2021112003 is an apocalyptic number.

2021112003 is a deficient number, since it is larger than the sum of its proper divisors (673704005).

2021112003 is an equidigital number, since it uses as much as digits as its factorization.

2021112003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673704004.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2021112003 is about 44956.7792774349. The cubic root of 2021112003 is about 1264.3387844610.

Adding to 2021112003 its reverse (3002111202), we get a palindrome (5023223205).

The spelling of 2021112003 in words is "two billion, twenty-one million, one hundred twelve thousand, three".