111021223 has 2 divisors, whose sum is σ = 111021224. Its totient is φ = 111021222.

The previous prime is 111021151. The next prime is 111021259. The reversal of 111021223 is 322120111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111021223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111021263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510611 + 55510612.

It is an arithmetic number, because the mean of its divisors is an integer number (55510612).

Almost surely, 2^111021223 is an apocalyptic number.

111021223 is a deficient number, since it is larger than the sum of its proper divisors (1).

111021223 is an equidigital number, since it uses as much as digits as its factorization.

111021223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 111021223 is about 10536.6609037209. The cubic root of 111021223 is about 480.6201807042.

Adding to 111021223 its reverse (322120111), we get a palindrome (433141334).

The spelling of 111021223 in words is "one hundred eleven million, twenty-one thousand, two hundred twenty-three".