21941201 has 4 divisors (see below), whose sum is σ = 22250304. Its totient is φ = 21632100.

The previous prime is 21941189. The next prime is 21941207. The reversal of 21941201 is 10214912.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21941201 - 2¹⁴ = 21924817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21941207) 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, 154445 + ... + 154586.

It is an arithmetic number, because the mean of its divisors is an integer number (5562576).

Almost surely, 2^21941201 is an apocalyptic number.

It is an amenable number.

21941201 is a deficient number, since it is larger than the sum of its proper divisors (309103).

21941201 is an equidigital number, since it uses as much as digits as its factorization.

21941201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309102.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 21941201 is about 4684.1435716681. The cubic root of 21941201 is about 279.9540783533.

The spelling of 21941201 in words is "twenty-one million, nine hundred forty-one thousand, two hundred one".