13113212212221 has 16 divisors (see below), whose sum is σ = 19099784758080. Its totient is φ = 7936559032320.

The previous prime is 13113212212201. The next prime is 13113212212259. The reversal of 13113212212221 is 12221221231131.

It is not a de Polignac number, because 13113212212221 - 2⁵ = 13113212212189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13113212212191 and 13113212212200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13113212212201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271033156 + ... + 271081533.

It is an arithmetic number, because the mean of its divisors is an integer number (1193736547380).

Almost surely, 2^{13113212212221} is an apocalyptic number.

13113212212221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13113212212221 is a deficient number, since it is larger than the sum of its proper divisors (5986572545859).

13113212212221 is a wasteful number, since it uses less digits than its factorization.

13113212212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542115436.

The product of its digits is 576, while the sum is 24.

Adding to 13113212212221 its reverse (12221221231131), we get a palindrome (25334433443352).

The spelling of 13113212212221 in words is "thirteen trillion, one hundred thirteen billion, two hundred twelve million, two hundred twelve thousand, two hundred twenty-one".