121321240123 has 8 divisors (see below), whose sum is σ = 121641717600. Its totient is φ = 121001186880.

The previous prime is 121321240067. The next prime is 121321240207. The reversal of 121321240123 is 321042123121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121321240123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121321240094 and 121321240103.

It is not an unprimeable number, because it can be changed into a prime (121321280123) 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 7 ways as a sum of consecutive naturals, for example, 470778 + ... + 681376.

It is an arithmetic number, because the mean of its divisors is an integer number (15205214700).

Almost surely, 2^121321240123 is an apocalyptic number.

121321240123 is a deficient number, since it is larger than the sum of its proper divisors (320477477).

121321240123 is an equidigital number, since it uses as much as digits as its factorization.

121321240123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212117.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 121321240123 its reverse (321042123121), we get a palindrome (442363363244).

The spelling of 121321240123 in words is "one hundred twenty-one billion, three hundred twenty-one million, two hundred forty thousand, one hundred twenty-three".