201110122221 has 4 divisors (see below), whose sum is σ = 268146829632. Its totient is φ = 134073414812.

The previous prime is 201110122183. The next prime is 201110122231. The reversal of 201110122221 is 122221011102.

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 201110122221 - 2²⁶ = 201043013357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201110122221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201110122231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33518353701 + ... + 33518353706.

It is an arithmetic number, because the mean of its divisors is an integer number (67036707408).

Almost surely, 2^201110122221 is an apocalyptic number.

It is an amenable number.

201110122221 is a deficient number, since it is larger than the sum of its proper divisors (67036707411).

201110122221 is an equidigital number, since it uses as much as digits as its factorization.

201110122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67036707410.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 201110122221 its reverse (122221011102), we get a palindrome (323331133323).

The spelling of 201110122221 in words is "two hundred one billion, one hundred ten million, one hundred twenty-two thousand, two hundred twenty-one".