21301141 has 4 divisors (see below), whose sum is σ = 21343500. Its totient is φ = 21258784.

The previous prime is 21301097. The next prime is 21301157. The reversal of 21301141 is 14110312.

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 17514225 + 3786916 = 4185^2 + 1946^2 .

It is a cyclic number.

It is not a de Polignac number, because 21301141 - 2¹¹ = 21299093 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 (21301741) 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 3 ways as a sum of consecutive naturals, for example, 20416 + ... + 21433.

It is an arithmetic number, because the mean of its divisors is an integer number (5335875).

Almost surely, 2^21301141 is an apocalyptic number.

It is an amenable number.

21301141 is a deficient number, since it is larger than the sum of its proper divisors (42359).

21301141 is an equidigital number, since it uses as much as digits as its factorization.

21301141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42358.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 21301141 is about 4615.3159155143. The cubic root of 21301141 is about 277.2049337764.

Adding to 21301141 its reverse (14110312), we get a palindrome (35411453).

The spelling of 21301141 in words is "twenty-one million, three hundred one thousand, one hundred forty-one".