22820111 has 2 divisors, whose sum is σ = 22820112. Its totient is φ = 22820110.

The previous prime is 22820101. The next prime is 22820113. The reversal of 22820111 is 11102822.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22820111 - 2¹⁰ = 22819087 is a prime.

Together with 22820113, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22820111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22820113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11410055 + 11410056.

It is an arithmetic number, because the mean of its divisors is an integer number (11410056).

Almost surely, 2^22820111 is an apocalyptic number.

22820111 is a deficient number, since it is larger than the sum of its proper divisors (1).

22820111 is an equidigital number, since it uses as much as digits as its factorization.

22820111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 22820111 is about 4777.0399830858. The cubic root of 22820111 is about 283.6433357426.

Adding to 22820111 its reverse (11102822), we get a palindrome (33922933).

The spelling of 22820111 in words is "twenty-two million, eight hundred twenty thousand, one hundred eleven".