131301122221 has 4 divisors (see below), whose sum is σ = 131749249212. Its totient is φ = 130852995232.

The previous prime is 131301122219. The next prime is 131301122257. The reversal of 131301122221 is 122221103131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122221103131 = 167 ⋅731862893.

It can be written as a sum of positive squares in 2 ways, for example, as 117656546121 + 13644576100 = 343011^2 + 116810^2 .

It is a cyclic number.

It is not a de Polignac number, because 131301122221 - 2¹ = 131301122219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131301822221) 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, 224063056 + ... + 224063641.

It is an arithmetic number, because the mean of its divisors is an integer number (32937312303).

Almost surely, 2^131301122221 is an apocalyptic number.

It is an amenable number.

131301122221 is a deficient number, since it is larger than the sum of its proper divisors (448126991).

131301122221 is an equidigital number, since it uses as much as digits as its factorization.

131301122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448126990.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 131301122221 its reverse (122221103131), we get a palindrome (253522225352).

The spelling of 131301122221 in words is "one hundred thirty-one billion, three hundred one million, one hundred twenty-two thousand, two hundred twenty-one".