13111332121221 has 8 divisors (see below), whose sum is σ = 17486385134400. Its totient is φ = 8738583594432.

The previous prime is 13111332121211. The next prime is 13111332121319. The reversal of 13111332121221 is 12212123311131.

13111332121221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13111332121221 - 2²¹ = 13111330024069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13111332121191 and 13111332121200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13111332121211) 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, 576108321 + ... + 576131078.

It is an arithmetic number, because the mean of its divisors is an integer number (2185798141800).

Almost surely, 2^{13111332121221} is an apocalyptic number.

It is an amenable number.

13111332121221 is a deficient number, since it is larger than the sum of its proper divisors (4375053013179).

13111332121221 is a wasteful number, since it uses less digits than its factorization.

13111332121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152243195.

The product of its digits is 432, while the sum is 24.

Adding to 13111332121221 its reverse (12212123311131), we get a palindrome (25323455432352).

The spelling of 13111332121221 in words is "thirteen trillion, one hundred eleven billion, three hundred thirty-two million, one hundred twenty-one thousand, two hundred twenty-one".