2103142421 has 4 divisors (see below), whose sum is σ = 2114892000. Its totient is φ = 2091392844.

The previous prime is 2103142397. The next prime is 2103142453. The reversal of 2103142421 is 1242413012.

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 a de Polignac number, because none of the positive numbers 2^k-2103142421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2103142393 and 2103142402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2103642421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5874521 + ... + 5874878.

It is an arithmetic number, because the mean of its divisors is an integer number (528723000).

Almost surely, 2^2103142421 is an apocalyptic number.

It is an amenable number.

2103142421 is a deficient number, since it is larger than the sum of its proper divisors (11749579).

2103142421 is a wasteful number, since it uses less digits than its factorization.

2103142421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11749578.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 2103142421 is about 45860.0307566404. The cubic root of 2103142421 is about 1281.2175956714.

Adding to 2103142421 its reverse (1242413012), we get a palindrome (3345555433).

The spelling of 2103142421 in words is "two billion, one hundred three million, one hundred forty-two thousand, four hundred twenty-one".