121110919 has 4 divisors (see below), whose sum is σ = 123927496. Its totient is φ = 118294344.

The previous prime is 121110911. The next prime is 121110929. The reversal of 121110919 is 919011121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121110919 - 2³ = 121110911 is a prime.

It is a super-2 number, since 2×121110919² = 29335709402049122, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 121110893 and 121110902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121110911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1408224 + ... + 1408309.

It is an arithmetic number, because the mean of its divisors is an integer number (30981874).

Almost surely, 2^121110919 is an apocalyptic number.

121110919 is a deficient number, since it is larger than the sum of its proper divisors (2816577).

121110919 is an equidigital number, since it uses as much as digits as its factorization.

121110919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2816576.

The product of its (nonzero) digits is 162, while the sum is 25.

The square root of 121110919 is about 11005.0406178260. The cubic root of 121110919 is about 494.7598317966.

The spelling of 121110919 in words is "one hundred twenty-one million, one hundred ten thousand, nine hundred nineteen".