201022201 has 4 divisors (see below), whose sum is σ = 201064612. Its totient is φ = 200979792.

The previous prime is 201022193. The next prime is 201022207. The reversal of 201022201 is 102220102.

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 73874025 + 127148176 = 8595^2 + 11276^2 .

It is a cyclic number.

It is not a de Polignac number, because 201022201 - 2³ = 201022193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201022207) 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, 13050 + ... + 23923.

It is an arithmetic number, because the mean of its divisors is an integer number (50266153).

Almost surely, 2^201022201 is an apocalyptic number.

It is an amenable number.

201022201 is a deficient number, since it is larger than the sum of its proper divisors (42411).

201022201 is an equidigital number, since it uses as much as digits as its factorization.

201022201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42410.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 201022201 is about 14178.2298260396. The cubic root of 201022201 is about 585.7981663472.

Adding to 201022201 its reverse (102220102), we get a palindrome (303242303).

The spelling of 201022201 in words is "two hundred one million, twenty-two thousand, two hundred one".