111100021222111 has 2 divisors, whose sum is σ = 111100021222112. Its totient is φ = 111100021222110.

The previous prime is 111100021222103. The next prime is 111100021222123. The reversal of 111100021222111 is 111222120001111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111100021222111 - 2³ = 111100021222103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111100021222181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55550010611055 + 55550010611056.

It is an arithmetic number, because the mean of its divisors is an integer number (55550010611056).

Almost surely, 2^{111100021222111} is an apocalyptic number.

111100021222111 is a deficient number, since it is larger than the sum of its proper divisors (1).

111100021222111 is an equidigital number, since it uses as much as digits as its factorization.

111100021222111 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 16.

Adding to 111100021222111 its reverse (111222120001111), we get a palindrome (222322141223222).

The spelling of 111100021222111 in words is "one hundred eleven trillion, one hundred billion, twenty-one million, two hundred twenty-two thousand, one hundred eleven".