13112012303221 has 4 divisors (see below), whose sum is σ = 14120628634252. Its totient is φ = 12103395972192.

The previous prime is 13112012303219. The next prime is 13112012303231. The reversal of 13112012303221 is 12230321021131.

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 7426224512100 + 5685787791121 = 2725110^2 + 2384489^2 .

It is a cyclic number.

It is not a de Polignac number, because 13112012303221 - 2¹ = 13112012303219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13112012303192 and 13112012303201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13112012303231) 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, 504308165496 + ... + 504308165521.

It is an arithmetic number, because the mean of its divisors is an integer number (3530157158563).

Almost surely, 2^{13112012303221} is an apocalyptic number.

It is an amenable number.

13112012303221 is a deficient number, since it is larger than the sum of its proper divisors (1008616331031).

13112012303221 is a wasteful number, since it uses less digits than its factorization.

13112012303221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008616331030.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 13112012303221 its reverse (12230321021131), we get a palindrome (25342333324352).

The spelling of 13112012303221 in words is "thirteen trillion, one hundred twelve billion, twelve million, three hundred three thousand, two hundred twenty-one".