13112112033221 has 4 divisors (see below), whose sum is σ = 13564253827500. Its totient is φ = 12659970238944.

The previous prime is 13112112033203. The next prime is 13112112033281. The reversal of 13112112033221 is 12233021121131.

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 5079501750625 + 8032610282596 = 2253775^2 + 2834186^2 .

It is a cyclic number.

It is not a de Polignac number, because 13112112033221 - 2⁶ = 13112112033157 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 (13112112033281) 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, 226070897096 + ... + 226070897153.

It is an arithmetic number, because the mean of its divisors is an integer number (3391063456875).

Almost surely, 2^{13112112033221} is an apocalyptic number.

It is an amenable number.

13112112033221 is a deficient number, since it is larger than the sum of its proper divisors (452141794279).

13112112033221 is an equidigital number, since it uses as much as digits as its factorization.

13112112033221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452141794278.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 13112112033221 its reverse (12233021121131), we get a palindrome (25345133154352).

The spelling of 13112112033221 in words is "thirteen trillion, one hundred twelve billion, one hundred twelve million, thirty-three thousand, two hundred twenty-one".