121111103 has 2 divisors, whose sum is σ = 121111104. Its totient is φ = 121111102.

The previous prime is 121111093. The next prime is 121111121. The reversal of 121111103 is 301111121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121111103 - 2¹⁰ = 121110079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121111603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60555551 + 60555552.

It is an arithmetic number, because the mean of its divisors is an integer number (60555552).

Almost surely, 2^121111103 is an apocalyptic number.

121111103 is a deficient number, since it is larger than the sum of its proper divisors (1).

121111103 is an equidigital number, since it uses as much as digits as its factorization.

121111103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 121111103 is about 11005.0489776284. The cubic root of 121111103 is about 494.7600823542.

Adding to 121111103 its reverse (301111121), we get a palindrome (422222224).

The spelling of 121111103 in words is "one hundred twenty-one million, one hundred eleven thousand, one hundred three".