121113123 has 8 divisors (see below), whose sum is σ = 161773248. Its totient is φ = 80597544.

The previous prime is 121113119. The next prime is 121113137. The reversal of 121113123 is 321311121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121113123 - 2² = 121113119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121113143) 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 7 ways as a sum of consecutive naturals, for example, 34165 + ... + 37542.

It is an arithmetic number, because the mean of its divisors is an integer number (20221656).

Almost surely, 2^121113123 is an apocalyptic number.

121113123 is a deficient number, since it is larger than the sum of its proper divisors (40660125).

121113123 is an equidigital number, since it uses as much as digits as its factorization.

121113123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72273.

The product of its digits is 36, while the sum is 15.

The square root of 121113123 is about 11005.1407533025. The cubic root of 121113123 is about 494.7628330236.

Adding to 121113123 its reverse (321311121), we get a palindrome (442424244).

The spelling of 121113123 in words is "one hundred twenty-one million, one hundred thirteen thousand, one hundred twenty-three".