2103240421 has 2 divisors, whose sum is σ = 2103240422. Its totient is φ = 2103240420.

The previous prime is 2103240409. The next prime is 2103240479. The reversal of 2103240421 is 1240423012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1990052100 + 113188321 = 44610^2 + 10639^2 .

It is a cyclic number.

It is not a de Polignac number, because 2103240421 - 2¹¹ = 2103238373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2103240401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051620210 + 1051620211.

It is an arithmetic number, because the mean of its divisors is an integer number (1051620211).

Almost surely, 2^2103240421 is an apocalyptic number.

It is an amenable number.

2103240421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2103240421 is an equidigital number, since it uses as much as digits as its factorization.

2103240421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2103240421 is about 45861.0992127315. The cubic root of 2103240421 is about 1281.2374956353.

Adding to 2103240421 its reverse (1240423012), we get a palindrome (3343663433).

The spelling of 2103240421 in words is "two billion, one hundred three million, two hundred forty thousand, four hundred twenty-one".