12310100112221 has 4 divisors (see below), whose sum is σ = 13034223648252. Its totient is φ = 11585976576192.

The previous prime is 12310100112217. The next prime is 12310100112239. The reversal of 12310100112221 is 12221100101321.

It is a happy number.

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 4310315776900 + 7999784335321 = 2076130^2 + 2828389^2 .

It is a cyclic number.

It is not a de Polignac number, because 12310100112221 - 2² = 12310100112217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 724123536013 = 12310100112221 / (1 + 2 + 3 + 1 + 0 + 1 + 0 + 0 + 1 + 1 + 2 + 2 + 2 + 1).

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 12310100112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12310100118221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362061767990 + ... + 362061768023.

It is an arithmetic number, because the mean of its divisors is an integer number (3258555912063).

Almost surely, 2^{12310100112221} is an apocalyptic number.

It is an amenable number.

12310100112221 is a deficient number, since it is larger than the sum of its proper divisors (724123536031).

12310100112221 is an equidigital number, since it uses as much as digits as its factorization.

12310100112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724123536030.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 12310100112221 its reverse (12221100101321), we get a palindrome (24531200213542).

The spelling of 12310100112221 in words is "twelve trillion, three hundred ten billion, one hundred million, one hundred twelve thousand, two hundred twenty-one".