22201111 has 2 divisors, whose sum is σ = 22201112. Its totient is φ = 22201110.

The previous prime is 22201093. The next prime is 22201121. The reversal of 22201111 is 11110222.

It is an a-pointer prime, because the next prime (22201121) can be obtained adding 22201111 to its sum of digits (10).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22201111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22201121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11100555 + 11100556.

It is an arithmetic number, because the mean of its divisors is an integer number (11100556).

Almost surely, 2^22201111 is an apocalyptic number.

22201111 is a deficient number, since it is larger than the sum of its proper divisors (1).

22201111 is an equidigital number, since it uses as much as digits as its factorization.

22201111 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 10.

The square root of 22201111 is about 4711.8054925899. The cubic root of 22201111 is about 281.0551640874.

Adding to 22201111 its reverse (11110222), we get a palindrome (33311333).

The spelling of 22201111 in words is "twenty-two million, two hundred one thousand, one hundred eleven".