121108123 has 4 divisors (see below), whose sum is σ = 121502920. Its totient is φ = 120713328.

The previous prime is 121108069. The next prime is 121108129. The reversal of 121108123 is 321801121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321801121 = 43 ⋅7483747.

It is a cyclic number.

It is not a de Polignac number, because 121108123 - 2¹³ = 121099931 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 121108123.

It is not an unprimeable number, because it can be changed into a prime (121108129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196938 + ... + 197551.

It is an arithmetic number, because the mean of its divisors is an integer number (30375730).

Almost surely, 2^121108123 is an apocalyptic number.

121108123 is a deficient number, since it is larger than the sum of its proper divisors (394797).

121108123 is an equidigital number, since it uses as much as digits as its factorization.

121108123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394796.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 121108123 is about 11004.9135843949. The cubic root of 121108123 is about 494.7560243801.

Adding to 121108123 its reverse (321801121), we get a palindrome (442909244).

The spelling of 121108123 in words is "one hundred twenty-one million, one hundred eight thousand, one hundred twenty-three".