11310131201221 has 4 divisors (see below), whose sum is σ = 11334665108844. Its totient is φ = 11285597293600.

The previous prime is 11310131201197. The next prime is 11310131201227. The reversal of 11310131201221 is 12210213101311.

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 6952788070596 + 4357343130625 = 2636814^2 + 2087425^2 .

It is a cyclic number.

It is not a de Polignac number, because 11310131201221 - 2²⁵ = 11310097646789 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 (11310131201227) 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, 12266953120 + ... + 12266954041.

It is an arithmetic number, because the mean of its divisors is an integer number (2833666277211).

Almost surely, 2^{11310131201221} is an apocalyptic number.

It is an amenable number.

11310131201221 is a deficient number, since it is larger than the sum of its proper divisors (24533907623).

11310131201221 is an equidigital number, since it uses as much as digits as its factorization.

11310131201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24533907622.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 11310131201221 its reverse (12210213101311), we get a palindrome (23520344302532).

The spelling of 11310131201221 in words is "eleven trillion, three hundred ten billion, one hundred thirty-one million, two hundred one thousand, two hundred twenty-one".