12240120121 has 4 divisors (see below), whose sum is σ = 12240441232. Its totient is φ = 12239799012.

The previous prime is 12240120107. The next prime is 12240120143. The reversal of 12240120121 is 12102104221.

12240120121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12102104221 = 1493 ⋅8105897.

It is a cyclic number.

It is not a de Polignac number, because 12240120121 - 2¹³ = 12240111929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12240120095 and 12240120104.

It is not an unprimeable number, because it can be changed into a prime (12240100121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94251 + ... + 182656.

It is an arithmetic number, because the mean of its divisors is an integer number (3060110308).

Almost surely, 2^12240120121 is an apocalyptic number.

It is an amenable number.

12240120121 is a deficient number, since it is larger than the sum of its proper divisors (321111).

12240120121 is an equidigital number, since it uses as much as digits as its factorization.

12240120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321110.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12240120121 its reverse (12102104221), we get a palindrome (24342224342).

The spelling of 12240120121 in words is "twelve billion, two hundred forty million, one hundred twenty thousand, one hundred twenty-one".