2103431021 has 8 divisors (see below), whose sum is σ = 2111400960. Its totient is φ = 2095474752.

The previous prime is 2103431017. The next prime is 2103431039. The reversal of 2103431021 is 1201343012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2103431021 - 2² = 2103431017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2103431041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 383726 + ... + 389168.

It is an arithmetic number, because the mean of its divisors is an integer number (263925120).

Almost surely, 2^2103431021 is an apocalyptic number.

It is an amenable number.

2103431021 is a deficient number, since it is larger than the sum of its proper divisors (7969939).

2103431021 is a wasteful number, since it uses less digits than its factorization.

2103431021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6835.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2103431021 is about 45863.1771795195. The cubic root of 2103431021 is about 1281.2761972641.

Adding to 2103431021 its reverse (1201343012), we get a palindrome (3304774033).

The spelling of 2103431021 in words is "two billion, one hundred three million, four hundred thirty-one thousand, twenty-one".