121122310123 has 4 divisors (see below), whose sum is σ = 121166990928. Its totient is φ = 121077629320.

The previous prime is 121122310117. The next prime is 121122310129. The reversal of 121122310123 is 321013221121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321013221121 = 43 ⋅7465423747.

It is an interprime number because it is at equal distance from previous prime (121122310117) and next prime (121122310129).

It is a cyclic number.

It is not a de Polignac number, because 121122310123 - 2¹³ = 121122301931 is a prime.

It is a super-2 number, since 2×121122310123² (a number of 23 digits) contains 22 as substring.

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 121122310123.

It is not an unprimeable number, because it can be changed into a prime (121122310129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22336336 + ... + 22341757.

It is an arithmetic number, because the mean of its divisors is an integer number (30291747732).

Almost surely, 2^121122310123 is an apocalyptic number.

121122310123 is a deficient number, since it is larger than the sum of its proper divisors (44680805).

121122310123 is an equidigital number, since it uses as much as digits as its factorization.

121122310123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44680804.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 121122310123 its reverse (321013221121), we get a palindrome (442135531244).

The spelling of 121122310123 in words is "one hundred twenty-one billion, one hundred twenty-two million, three hundred ten thousand, one hundred twenty-three".