111220223111 has 2 divisors, whose sum is σ = 111220223112. Its totient is φ = 111220223110.

The previous prime is 111220223083. The next prime is 111220223117. The reversal of 111220223111 is 111322022111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111220223111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111220223111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111220223117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610111555 + 55610111556.

It is an arithmetic number, because the mean of its divisors is an integer number (55610111556).

Almost surely, 2^111220223111 is an apocalyptic number.

111220223111 is a deficient number, since it is larger than the sum of its proper divisors (1).

111220223111 is an equidigital number, since it uses as much as digits as its factorization.

111220223111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 111220223111 its reverse (111322022111), we get a palindrome (222542245222).

The spelling of 111220223111 in words is "one hundred eleven billion, two hundred twenty million, two hundred twenty-three thousand, one hundred eleven".