131221302103231 has 4 divisors (see below), whose sum is σ = 131230741819464. Its totient is φ = 131211862387000.

The previous prime is 131221302103219. The next prime is 131221302103277. The reversal of 131221302103231 is 132301203122131.

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

It is a cyclic number.

It is not a de Polignac number, because 131221302103231 - 2³¹ = 131219154619583 is a prime.

It is a super-2 number, since 2×131221302103231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131221302103196 and 131221302103205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131221302104231) 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, 4719837265 + ... + 4719865066.

It is an arithmetic number, because the mean of its divisors is an integer number (32807685454866).

Almost surely, 2^{131221302103231} is an apocalyptic number.

131221302103231 is a deficient number, since it is larger than the sum of its proper divisors (9439716233).

131221302103231 is an equidigital number, since it uses as much as digits as its factorization.

131221302103231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9439716232.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 131221302103231 its reverse (132301203122131), we get a palindrome (263522505225362).

The spelling of 131221302103231 in words is "one hundred thirty-one trillion, two hundred twenty-one billion, three hundred two million, one hundred three thousand, two hundred thirty-one".