12121120303 has 4 divisors (see below), whose sum is σ = 12326563080. Its totient is φ = 11915677528.

The previous prime is 12121120261. The next prime is 12121120327. The reversal of 12121120303 is 30302112121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30302112121 = 367 ⋅82567063.

It is a cyclic number.

It is not a de Polignac number, because 12121120303 - 2²⁵ = 12087565871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121120603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102721300 + ... + 102721417.

It is an arithmetic number, because the mean of its divisors is an integer number (3081640770).

Almost surely, 2^12121120303 is an apocalyptic number.

12121120303 is a deficient number, since it is larger than the sum of its proper divisors (205442777).

12121120303 is an equidigital number, since it uses as much as digits as its factorization.

12121120303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205442776.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12121120303 its reverse (30302112121), we get a palindrome (42423232424).

The spelling of 12121120303 in words is "twelve billion, one hundred twenty-one million, one hundred twenty thousand, three hundred three".