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201102221 = 770326107

201102221 has 4 divisors (see below), whose sum is σ = 201136032. Its totient is φ = 201068412.

The previous prime is 201102199. The next prime is 201102227. The reversal of 201102221 is 122201102.

It is a happy number.

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 201102221 - 26 = 201102157 is a prime.

It is a super-2 number, since 2×2011022212 = 80884206582265682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201102227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5351 + ... + 20756.

It is an arithmetic number, because the mean of its divisors is an integer number (50284008).

Almost surely, 2201102221 is an apocalyptic number.

It is an amenable number.

201102221 is a deficient number, since it is larger than the sum of its proper divisors (33811).

201102221 is an equidigital number, since it uses as much as digits as its factorization.

201102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33810.

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

The square root of 201102221 is about 14181.0514772354. The cubic root of 201102221 is about 585.8758847129.

Adding to 201102221 its reverse (122201102), we get a palindrome (323303323).

The spelling of 201102221 in words is "two hundred one million, one hundred two thousand, two hundred twenty-one".

Divisors: 1 7703 26107 201102221