111123222169 has 2 divisors, whose sum is σ = 111123222170. Its totient is φ = 111123222168.

The previous prime is 111123222149. The next prime is 111123222181. The reversal of 111123222169 is 961222321111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110115794569 + 1007427600 = 331837^2 + 31740^2 .

It is a cyclic number.

It is not a de Polignac number, because 111123222169 - 2¹¹ = 111123220121 is a prime.

It is a super-2 number, since 2×111123222169² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111123222169.

It is not a weakly prime, because it can be changed into another prime (111123222149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55561611084 + 55561611085.

It is an arithmetic number, because the mean of its divisors is an integer number (55561611085).

Almost surely, 2^111123222169 is an apocalyptic number.

It is an amenable number.

111123222169 is a deficient number, since it is larger than the sum of its proper divisors (1).

111123222169 is an equidigital number, since it uses as much as digits as its factorization.

111123222169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 31.

It can be divided in two parts, 11112322216 and 9, that added together give a square (11112322225 = 105415²).

The spelling of 111123222169 in words is "one hundred eleven billion, one hundred twenty-three million, two hundred twenty-two thousand, one hundred sixty-nine".