131221324444211 has 4 divisors (see below), whose sum is σ = 131235444901632. Its totient is φ = 131207203986792.

The previous prime is 131221324444183. The next prime is 131221324444241. The reversal of 131221324444211 is 112444423122131.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131221324444211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131221324444241) 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, 7060214771 + ... + 7060233356.

It is an arithmetic number, because the mean of its divisors is an integer number (32808861225408).

Almost surely, 2^{131221324444211} is an apocalyptic number.

131221324444211 is a deficient number, since it is larger than the sum of its proper divisors (14120457421).

131221324444211 is an equidigital number, since it uses as much as digits as its factorization.

131221324444211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14120457420.

The product of its digits is 36864, while the sum is 35.

Adding to 131221324444211 its reverse (112444423122131), we get a palindrome (243665747566342).

The spelling of 131221324444211 in words is "one hundred thirty-one trillion, two hundred twenty-one billion, three hundred twenty-four million, four hundred forty-four thousand, two hundred eleven".