121042111 has 2 divisors, whose sum is σ = 121042112. Its totient is φ = 121042110.

The previous prime is 121042093. The next prime is 121042139. The reversal of 121042111 is 111240121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121042111 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 121042091 and 121042100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121042151) 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, 60521055 + 60521056.

It is an arithmetic number, because the mean of its divisors is an integer number (60521056).

Almost surely, 2^121042111 is an apocalyptic number.

121042111 is a deficient number, since it is larger than the sum of its proper divisors (1).

121042111 is an equidigital number, since it uses as much as digits as its factorization.

121042111 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 13.

The square root of 121042111 is about 11001.9139698509. The cubic root of 121042111 is about 494.6661163718. Note that the first 3 decimals are identical.

Adding to 121042111 its reverse (111240121), we get a palindrome (232282232).

The spelling of 121042111 in words is "one hundred twenty-one million, forty-two thousand, one hundred eleven".