2103331021 has 6 divisors (see below), whose sum is σ = 2311925966. Its totient is φ = 1912119000.

The previous prime is 2103331007. The next prime is 2103331033. The reversal of 2103331021 is 1201333012.

It can be written as a sum of positive squares in only one way, i.e., 2084926921 + 18404100 = 45661^2 + 4290^2 .

It is not a de Polignac number, because 2103331021 - 2⁷ = 2103330893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2103330986 and 2103331004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2103331621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8691330 + ... + 8691571.

Almost surely, 2^2103331021 is an apocalyptic number.

It is an amenable number.

2103331021 is a deficient number, since it is larger than the sum of its proper divisors (208594945).

2103331021 is a wasteful number, since it uses less digits than its factorization.

2103331021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17382923 (or 17382912 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 2103331021 is about 45862.0869673416. The cubic root of 2103331021 is about 1281.2558923988.

Adding to 2103331021 its reverse (1201333012), we get a palindrome (3304664033).

The spelling of 2103331021 in words is "two billion, one hundred three million, three hundred thirty-one thousand, twenty-one".