111222021223 has 2 divisors, whose sum is σ = 111222021224. Its totient is φ = 111222021222.

The previous prime is 111222021199. The next prime is 111222021241. The reversal of 111222021223 is 322120222111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111222021223 - 2⁹ = 111222020711 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111222021223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111222021023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55611010611 + 55611010612.

It is an arithmetic number, because the mean of its divisors is an integer number (55611010612).

Almost surely, 2^111222021223 is an apocalyptic number.

111222021223 is a deficient number, since it is larger than the sum of its proper divisors (1).

111222021223 is an equidigital number, since it uses as much as digits as its factorization.

111222021223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 111222021223 its reverse (322120222111), we get a palindrome (433342243334).

The spelling of 111222021223 in words is "one hundred eleven billion, two hundred twenty-two million, twenty-one thousand, two hundred twenty-three".