110121689 has 2 divisors, whose sum is σ = 110121690. Its totient is φ = 110121688.

The previous prime is 110121647. The next prime is 110121691. The reversal of 110121689 is 986121011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66667225 + 43454464 = 8165^2 + 6592^2 .

It is a cyclic number.

It is not a de Polignac number, because 110121689 - 2⁸ = 110121433 is a prime.

It is a Sophie Germain prime.

Together with 110121691, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (110121619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55060844 + 55060845.

It is an arithmetic number, because the mean of its divisors is an integer number (55060845).

Almost surely, 2^110121689 is an apocalyptic number.

It is an amenable number.

110121689 is a deficient number, since it is larger than the sum of its proper divisors (1).

110121689 is an equidigital number, since it uses as much as digits as its factorization.

110121689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 29.

The square root of 110121689 is about 10493.8881735990. Note that the first 3 decimals coincide. The cubic root of 110121689 is about 479.3186063778.

The spelling of 110121689 in words is "one hundred ten million, one hundred twenty-one thousand, six hundred eighty-nine".