1110201221 has 2 divisors, whose sum is σ = 1110201222. Its totient is φ = 1110201220.

The previous prime is 1110201203. The next prime is 1110201223. The reversal of 1110201221 is 1221020111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 729756196 + 380445025 = 27014^2 + 19505^2 .

It is an emirp because it is prime and its reverse (1221020111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1110201221 - 2¹⁰ = 1110200197 is a prime.

It is a super-2 number, since 2×1110201221² = 2465093502219781682, which contains 22 as substring.

Together with 1110201223, 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 (1110201223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555100610 + 555100611.

It is an arithmetic number, because the mean of its divisors is an integer number (555100611).

Almost surely, 2^1110201221 is an apocalyptic number.

It is an amenable number.

1110201221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1110201221 is an equidigital number, since it uses as much as digits as its factorization.

1110201221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1110201221 is about 33319.6821863595. The cubic root of 1110201221 is about 1035.4613674288.

Adding to 1110201221 its reverse (1221020111), we get a palindrome (2331221332).

The spelling of 1110201221 in words is "one billion, one hundred ten million, two hundred one thousand, two hundred twenty-one".