21124301 has 16 divisors (see below), whose sum is σ = 23716800. Its totient is φ = 18808240.

The previous prime is 21124289. The next prime is 21124321. The reversal of 21124301 is 10342112.

It is a de Polignac number, because none of the positive numbers 2^k-21124301 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 (21124321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78395 + ... + 78663.

It is an arithmetic number, because the mean of its divisors is an integer number (1482300).

Almost surely, 2^21124301 is an apocalyptic number.

It is an amenable number.

21124301 is a deficient number, since it is larger than the sum of its proper divisors (2592499).

21124301 is an equidigital number, since it uses as much as digits as its factorization.

21124301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 21124301 is about 4596.1180359081. The cubic root of 21124301 is about 276.4356916455.

Adding to 21124301 its reverse (10342112), we get a palindrome (31466413).

The spelling of 21124301 in words is "twenty-one million, one hundred twenty-four thousand, three hundred one".