111222020111 has 2 divisors, whose sum is σ = 111222020112. Its totient is φ = 111222020110.

The previous prime is 111222020087. The next prime is 111222020183. The reversal of 111222020111 is 111020222111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111222020111 - 2⁶ = 111222020047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111222020711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55611010055 + 55611010056.

It is an arithmetic number, because the mean of its divisors is an integer number (55611010056).

Almost surely, 2^111222020111 is an apocalyptic number.

111222020111 is a deficient number, since it is larger than the sum of its proper divisors (1).

111222020111 is an equidigital number, since it uses as much as digits as its factorization.

111222020111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111222020111 its reverse (111020222111), we get a palindrome (222242242222).

It can be divided in two parts, 111 and 222020111, that added together give a palindrome (222020222).

The spelling of 111222020111 in words is "one hundred eleven billion, two hundred twenty-two million, twenty thousand, one hundred eleven".