21001341 has 12 divisors (see below), whose sum is σ = 29747072. Its totient is φ = 13176768.

The previous prime is 21001319. The next prime is 21001349. The reversal of 21001341 is 14310012.

It is a happy number.

It is not a de Polignac number, because 21001341 - 2¹³ = 20993149 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 (21001349) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11245 + ... + 12978.

Almost surely, 2^21001341 is an apocalyptic number.

It is an amenable number.

21001341 is a deficient number, since it is larger than the sum of its proper divisors (8745731).

21001341 is a wasteful number, since it uses less digits than its factorization.

21001341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24260 (or 24243 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 21001341 is about 4582.7220077155. The cubic root of 21001341 is about 275.8982900803.

Adding to 21001341 its reverse (14310012), we get a palindrome (35311353).

The spelling of 21001341 in words is "twenty-one million, one thousand, three hundred forty-one".