20110201 has 4 divisors (see below), whose sum is σ = 21293172. Its totient is φ = 18927232.

The previous prime is 20110183. The next prime is 20110217. The reversal of 20110201 is 10201102.

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 14592400 + 5517801 = 3820^2 + 2349^2 .

It is a cyclic number.

It is not a de Polignac number, because 20110201 - 2⁵ = 20110169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20110231) 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, 591460 + ... + 591493.

It is an arithmetic number, because the mean of its divisors is an integer number (5323293).

Almost surely, 2^20110201 is an apocalyptic number.

It is an amenable number.

20110201 is a deficient number, since it is larger than the sum of its proper divisors (1182971).

20110201 is a wasteful number, since it uses less digits than its factorization.

20110201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1182970.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 20110201 is about 4484.4398758373. The cubic root of 20110201 is about 271.9394013287.

Adding to 20110201 its reverse (10201102), we get a palindrome (30311303).

Subtracting from 20110201 its reverse (10201102), we obtain a palindrome (9909099).

The spelling of 20110201 in words is "twenty million, one hundred ten thousand, two hundred one".