131220023221321 has 16 divisors (see below), whose sum is σ = 139173813020160. Its totient is φ = 123453729558720.

The previous prime is 131220023221303. The next prime is 131220023221381. The reversal of 131220023221321 is 123122320022131.

It is a cyclic number.

It is not a de Polignac number, because 131220023221321 - 2¹¹ = 131220023219273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131220023221381) 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, 49538496 + ... + 52120078.

It is an arithmetic number, because the mean of its divisors is an integer number (8698363313760).

Almost surely, 2^{131220023221321} is an apocalyptic number.

It is an amenable number.

131220023221321 is a deficient number, since it is larger than the sum of its proper divisors (7953789798839).

131220023221321 is a wasteful number, since it uses less digits than its factorization.

131220023221321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2617896.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 131220023221321 its reverse (123122320022131), we get a palindrome (254342343243452).

The spelling of 131220023221321 in words is "one hundred thirty-one trillion, two hundred twenty billion, twenty-three million, two hundred twenty-one thousand, three hundred twenty-one".