121110109 has 2 divisors, whose sum is σ = 121110110. Its totient is φ = 121110108.

The previous prime is 121110089. The next prime is 121110113. The reversal of 121110109 is 901011121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121066009 + 44100 = 11003^2 + 210^2 .

It is a cyclic number.

It is not a de Polignac number, because 121110109 - 2¹⁷ = 120979037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121110092 and 121110101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121114109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60555054 + 60555055.

It is an arithmetic number, because the mean of its divisors is an integer number (60555055).

Almost surely, 2^121110109 is an apocalyptic number.

It is an amenable number.

121110109 is a deficient number, since it is larger than the sum of its proper divisors (1).

121110109 is an equidigital number, since it uses as much as digits as its factorization.

121110109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 16.

The square root of 121110109 is about 11005.0038164464. The cubic root of 121110109 is about 494.7587287957.

The spelling of 121110109 in words is "one hundred twenty-one million, one hundred ten thousand, one hundred nine".