131344353331221 has 4 divisors (see below), whose sum is σ = 175125804441632. Its totient is φ = 87562902220812.

The previous prime is 131344353331201. The next prime is 131344353331241. The reversal of 131344353331221 is 122133353443131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (131344353331201) and next prime (131344353331241).

It is not a de Polignac number, because 131344353331221 - 2²¹ = 131344351234069 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131344353331221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131344353331201) 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, 21890725555201 + ... + 21890725555206.

It is an arithmetic number, because the mean of its divisors is an integer number (43781451110408).

Almost surely, 2^{131344353331221} is an apocalyptic number.

It is an amenable number.

131344353331221 is a deficient number, since it is larger than the sum of its proper divisors (43781451110411).

131344353331221 is an equidigital number, since it uses as much as digits as its factorization.

131344353331221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43781451110410.

The product of its digits is 233280, while the sum is 39.

The spelling of 131344353331221 in words is "one hundred thirty-one trillion, three hundred forty-four billion, three hundred fifty-three million, three hundred thirty-one thousand, two hundred twenty-one".