131043041201221 has 4 divisors (see below), whose sum is σ = 131227869186700. Its totient is φ = 130858213215744.

The previous prime is 131043041201173. The next prime is 131043041201243. The reversal of 131043041201221 is 122102140340131.

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 10384899398721 + 120658141802500 = 3222561^2 + 10984450^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131043041201221 is a prime.

It is a super-2 number, since 2×131043041201221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131043041201021) 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, 92413991676 + ... + 92413993093.

It is an arithmetic number, because the mean of its divisors is an integer number (32806967296675).

Almost surely, 2^{131043041201221} is an apocalyptic number.

It is an amenable number.

131043041201221 is a deficient number, since it is larger than the sum of its proper divisors (184827985479).

131043041201221 is an equidigital number, since it uses as much as digits as its factorization.

131043041201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184827985478.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 131043041201221 its reverse (122102140340131), we get a palindrome (253145181541352).

The spelling of 131043041201221 in words is "one hundred thirty-one trillion, forty-three billion, forty-one million, two hundred one thousand, two hundred twenty-one".