131203312321 has 8 divisors (see below), whose sum is σ = 135759695400. Its totient is φ = 126649071360.

The previous prime is 131203312313. The next prime is 131203312447. The reversal of 131203312321 is 123213302131.

It can be written as a sum of positive squares in 4 ways, for example, as 34497861696 + 96705450625 = 185736^2 + 310975^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 131203312321 - 2³ = 131203312313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131203312292 and 131203312301.

It is not an unprimeable number, because it can be changed into a prime (131203313321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 410406 + ... + 656383.

It is an arithmetic number, because the mean of its divisors is an integer number (16969961925).

Almost surely, 2^131203312321 is an apocalyptic number.

It is an amenable number.

131203312321 is a deficient number, since it is larger than the sum of its proper divisors (4556383079).

131203312321 is a wasteful number, since it uses less digits than its factorization.

131203312321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071059.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 131203312321 its reverse (123213302131), we get a palindrome (254416614452).

The spelling of 131203312321 in words is "one hundred thirty-one billion, two hundred three million, three hundred twelve thousand, three hundred twenty-one".