131121300203 has 4 divisors (see below), whose sum is σ = 138834317880. Its totient is φ = 123408282528.

The previous prime is 131121300199. The next prime is 131121300217. The reversal of 131121300203 is 302003121131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131121300203 - 2² = 131121300199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 7713017659 = 131121300203 / (1 + 3 + 1 + 1 + 2 + 1 + 3 + 0 + 0 + 2 + 0 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131121300283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3856508813 + ... + 3856508846.

It is an arithmetic number, because the mean of its divisors is an integer number (34708579470).

Almost surely, 2^131121300203 is an apocalyptic number.

131121300203 is a deficient number, since it is larger than the sum of its proper divisors (7713017677).

131121300203 is an equidigital number, since it uses as much as digits as its factorization.

131121300203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7713017676.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 131121300203 its reverse (302003121131), we get a palindrome (433124421334).

The spelling of 131121300203 in words is "one hundred thirty-one billion, one hundred twenty-one million, three hundred thousand, two hundred three".