2100003421 has 4 divisors (see below), whose sum is σ = 2223533052. Its totient is φ = 1976473792.

The previous prime is 2100003397. The next prime is 2100003527. The reversal of 2100003421 is 1243000012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 649536196 + 1450467225 = 25486^2 + 38085^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100003421 - 2¹⁹ = 2099479133 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 (2100003121) 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, 61764790 + ... + 61764823.

It is an arithmetic number, because the mean of its divisors is an integer number (555883263).

Almost surely, 2^2100003421 is an apocalyptic number.

It is an amenable number.

2100003421 is a deficient number, since it is larger than the sum of its proper divisors (123529631).

2100003421 is a wasteful number, since it uses less digits than its factorization.

2100003421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123529630.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2100003421 is about 45825.7942757133. The cubic root of 2100003421 is about 1280.5798603619.

Adding to 2100003421 its reverse (1243000012), we get a palindrome (3343003433).

The spelling of 2100003421 in words is "two billion, one hundred million, three thousand, four hundred twenty-one".