121135123 has 4 divisors (see below), whose sum is σ = 121261360. Its totient is φ = 121008888.

The previous prime is 121135111. The next prime is 121135169. The reversal of 121135123 is 321531121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321531121 = 1163 ⋅276467.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121135123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121135123.

It is not an unprimeable number, because it can be changed into a prime (121135193) 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, 61668 + ... + 63601.

It is an arithmetic number, because the mean of its divisors is an integer number (30315340).

Almost surely, 2^121135123 is an apocalyptic number.

121135123 is a deficient number, since it is larger than the sum of its proper divisors (126237).

121135123 is an equidigital number, since it uses as much as digits as its factorization.

121135123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126236.

The product of its digits is 180, while the sum is 19.

The square root of 121135123 is about 11006.1402407929. The cubic root of 121135123 is about 494.7927888287.

Adding to 121135123 its reverse (321531121), we get a palindrome (442666244).

The spelling of 121135123 in words is "one hundred twenty-one million, one hundred thirty-five thousand, one hundred twenty-three".