13112310311221 has 8 divisors (see below), whose sum is σ = 14304457893600. Its totient is φ = 11920182624240.

The previous prime is 13112310311167. The next prime is 13112310311299. The reversal of 13112310311221 is 12211301321131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13112310311221 - 2³³ = 13103720376629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13112310311192 and 13112310311201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13112310311021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3578791 + ... + 6247588.

It is an arithmetic number, because the mean of its divisors is an integer number (1788057236700).

Almost surely, 2^{13112310311221} is an apocalyptic number.

13112310311221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13112310311221 is a deficient number, since it is larger than the sum of its proper divisors (1192147582379).

13112310311221 is a wasteful number, since it uses less digits than its factorization.

13112310311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9947699.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 13112310311221 its reverse (12211301321131), we get a palindrome (25323611632352).

The spelling of 13112310311221 in words is "thirteen trillion, one hundred twelve billion, three hundred ten million, three hundred eleven thousand, two hundred twenty-one".