121100120111 has 2 divisors, whose sum is σ = 121100120112. Its totient is φ = 121100120110.

The previous prime is 121100120069. The next prime is 121100120129. The reversal of 121100120111 is 111021001121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121100120111 - 2¹⁴ = 121100103727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121100120092 and 121100120101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121100170111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60550060055 + 60550060056.

It is an arithmetic number, because the mean of its divisors is an integer number (60550060056).

Almost surely, 2^121100120111 is an apocalyptic number.

121100120111 is a deficient number, since it is larger than the sum of its proper divisors (1).

121100120111 is an equidigital number, since it uses as much as digits as its factorization.

121100120111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 121100120111 its reverse (111021001121), we get a palindrome (232121121232).

The spelling of 121100120111 in words is "one hundred twenty-one billion, one hundred million, one hundred twenty thousand, one hundred eleven".