131220031112321 has 8 divisors (see below), whose sum is σ = 132085224369000. Its totient is φ = 130357633311360.

The previous prime is 131220031112311. The next prime is 131220031112347. The reversal of 131220031112321 is 123211130022131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 29393041756225 + 101826989356096 = 5421535^2 + 10090936^2 .

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 131220031112321 - 2⁶ = 131220031112257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131220031112311) 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, 698769740 + ... + 698957501.

It is an arithmetic number, because the mean of its divisors is an integer number (16510653046125).

Almost surely, 2^{131220031112321} is an apocalyptic number.

It is an amenable number.

131220031112321 is a deficient number, since it is larger than the sum of its proper divisors (865193256679).

131220031112321 is a wasteful number, since it uses less digits than its factorization.

131220031112321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397727859.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 131220031112321 its reverse (123211130022131), we get a palindrome (254431161134452).

The spelling of 131220031112321 in words is "one hundred thirty-one trillion, two hundred twenty billion, thirty-one million, one hundred twelve thousand, three hundred twenty-one".