2103011321 has 4 divisors (see below), whose sum is σ = 2103126144. Its totient is φ = 2102896500.

The previous prime is 2103011303. The next prime is 2103011341. The reversal of 2103011321 is 1231103012.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2103011321 - 2¹⁸ = 2102749177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2103011296 and 2103011305.

It is not an unprimeable number, because it can be changed into a prime (2103011341) 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, 23105 + ... + 68846.

It is an arithmetic number, because the mean of its divisors is an integer number (525781536).

Almost surely, 2^2103011321 is an apocalyptic number.

It is an amenable number.

2103011321 is a deficient number, since it is larger than the sum of its proper divisors (114823).

2103011321 is an equidigital number, since it uses as much as digits as its factorization.

2103011321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114822.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 2103011321 is about 45858.6013851273. The cubic root of 2103011321 is about 1281.1909734267.

Adding to 2103011321 its reverse (1231103012), we get a palindrome (3334114333).

The spelling of 2103011321 in words is "two billion, one hundred three million, eleven thousand, three hundred twenty-one".