21410201 has 4 divisors (see below), whose sum is σ = 21435492. Its totient is φ = 21384912.

The previous prime is 21410189. The next prime is 21410219. The reversal of 21410201 is 10201412.

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 11323225 + 10086976 = 3365^2 + 3176^2 .

It is a cyclic number.

It is not a de Polignac number, because 21410201 - 2¹⁰ = 21409177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21410261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11330 + ... + 13083.

It is an arithmetic number, because the mean of its divisors is an integer number (5358873).

Almost surely, 2^21410201 is an apocalyptic number.

It is an amenable number.

21410201 is a deficient number, since it is larger than the sum of its proper divisors (25291).

21410201 is an equidigital number, since it uses as much as digits as its factorization.

21410201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25290.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 21410201 is about 4627.1158403481. The cubic root of 21410201 is about 277.6772171048.

Adding to 21410201 its reverse (10201412), we get a palindrome (31611613).

The spelling of 21410201 in words is "twenty-one million, four hundred ten thousand, two hundred one".