131104002221 has 4 divisors (see below), whose sum is σ = 131106044892. Its totient is φ = 131101959552.

The previous prime is 131104002181. The next prime is 131104002257. The reversal of 131104002221 is 122200401131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122200401131 = 102761 ⋅1189171.

It can be written as a sum of positive squares in 2 ways, for example, as 89493714025 + 41610288196 = 299155^2 + 203986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131104002221 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 131104002221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131104002721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 921830 + ... + 1054503.

It is an arithmetic number, because the mean of its divisors is an integer number (32776511223).

Almost surely, 2^131104002221 is an apocalyptic number.

It is an amenable number.

131104002221 is a deficient number, since it is larger than the sum of its proper divisors (2042671).

131104002221 is an equidigital number, since it uses as much as digits as its factorization.

131104002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042670.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 131104002221 its reverse (122200401131), we get a palindrome (253304403352).

The spelling of 131104002221 in words is "one hundred thirty-one billion, one hundred four million, two thousand, two hundred twenty-one".