121355113 has 4 divisors (see below), whose sum is σ = 132387408. Its totient is φ = 110322820.

The previous prime is 121355093. The next prime is 121355141. The reversal of 121355113 is 311553121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 311553121 = 11 ⋅28323011.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121355113 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121355183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5516131 + ... + 5516152.

It is an arithmetic number, because the mean of its divisors is an integer number (33096852).

Almost surely, 2^121355113 is an apocalyptic number.

It is an amenable number.

121355113 is a deficient number, since it is larger than the sum of its proper divisors (11032295).

121355113 is a wasteful number, since it uses less digits than its factorization.

121355113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11032294.

The product of its digits is 450, while the sum is 22.

The square root of 121355113 is about 11016.1296742549. The cubic root of 121355113 is about 495.0921339911.

The spelling of 121355113 in words is "one hundred twenty-one million, three hundred fifty-five thousand, one hundred thirteen".