201120221 has 2 divisors, whose sum is σ = 201120222. Its totient is φ = 201120220.

The previous prime is 201120163. The next prime is 201120223. The reversal of 201120221 is 122021102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193905625 + 7214596 = 13925^2 + 2686^2 .

It is a cyclic number.

It is not a de Polignac number, because 201120221 - 2²² = 196925917 is a prime.

Together with 201120223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201120223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100560110 + 100560111.

It is an arithmetic number, because the mean of its divisors is an integer number (100560111).

Almost surely, 2^201120221 is an apocalyptic number.

It is an amenable number.

201120221 is a deficient number, since it is larger than the sum of its proper divisors (1).

201120221 is an equidigital number, since it uses as much as digits as its factorization.

201120221 is an evil number, because the sum of its binary digits is even.

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

The square root of 201120221 is about 14181.6861127300. The cubic root of 201120221 is about 585.8933641341.

Adding to 201120221 its reverse (122021102), we get a palindrome (323141323).

The spelling of 201120221 in words is "two hundred one million, one hundred twenty thousand, two hundred twenty-one".