12131220303 has 24 divisors (see below), whose sum is σ = 18778931808. Its totient is φ = 7526768832.

The previous prime is 12131220253. The next prime is 12131220331. The reversal of 12131220303 is 30302213121.

12131220303 is a `hidden beast` number, since 12 + 131 + 220 + 303 = 666.

It is not a de Polignac number, because 12131220303 - 2⁹ = 12131219791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131221303) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 784300 + ... + 799617.

It is an arithmetic number, because the mean of its divisors is an integer number (782455492).

Almost surely, 2^12131220303 is an apocalyptic number.

12131220303 is a deficient number, since it is larger than the sum of its proper divisors (6647711505).

12131220303 is a wasteful number, since it uses less digits than its factorization.

12131220303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583983 (or 1583980 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 12131220303 its reverse (30302213121), we get a palindrome (42433433424).

The spelling of 12131220303 in words is "twelve billion, one hundred thirty-one million, two hundred twenty thousand, three hundred three".