131312320321 has 16 divisors (see below), whose sum is σ = 161664055168. Its totient is φ = 103864032000.

The previous prime is 131312320277. The next prime is 131312320369. The reversal of 131312320321 is 123023213131.

It is a cyclic number.

It is not a de Polignac number, because 131312320321 - 2¹³ = 131312312129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131312320292 and 131312320301.

It is not an unprimeable number, because it can be changed into a prime (131312320121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86521 + ... + 519721.

It is an arithmetic number, because the mean of its divisors is an integer number (10104003448).

Almost surely, 2^131312320321 is an apocalyptic number.

It is an amenable number.

131312320321 is a deficient number, since it is larger than the sum of its proper divisors (30351734847).

131312320321 is a wasteful number, since it uses less digits than its factorization.

131312320321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436552.

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

Adding to 131312320321 its reverse (123023213131), we get a palindrome (254335533452).

The spelling of 131312320321 in words is "one hundred thirty-one billion, three hundred twelve million, three hundred twenty thousand, three hundred twenty-one".