131303101011221 has 4 divisors (see below), whose sum is σ = 131317285216332. Its totient is φ = 131288916806112.

The previous prime is 131303101011209. The next prime is 131303101011241. The reversal of 131303101011221 is 122110101303131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17677862295025 + 113625238716196 = 4204505^2 + 10659514^2 .

It is a cyclic number.

It is not a de Polignac number, because 131303101011221 - 2²² = 131303096816917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131303101011193 and 131303101011202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131303101011241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7092088670 + ... + 7092107183.

It is an arithmetic number, because the mean of its divisors is an integer number (32829321304083).

Almost surely, 2^{131303101011221} is an apocalyptic number.

It is an amenable number.

131303101011221 is a deficient number, since it is larger than the sum of its proper divisors (14184205111).

131303101011221 is an equidigital number, since it uses as much as digits as its factorization.

131303101011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14184205110.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 131303101011221 its reverse (122110101303131), we get a palindrome (253413202314352).

The spelling of 131303101011221 in words is "one hundred thirty-one trillion, three hundred three billion, one hundred one million, eleven thousand, two hundred twenty-one".