13111113022221 has 32 divisors (see below), whose sum is σ = 17863200432000. Its totient is φ = 8551671448320.

The previous prime is 13111113022213. The next prime is 13111113022237. The reversal of 13111113022221 is 12222031111131.

It is not a de Polignac number, because 13111113022221 - 2³ = 13111113022213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13111113022201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 549282675 + ... + 549306543.

It is an arithmetic number, because the mean of its divisors is an integer number (558225013500).

Almost surely, 2^{13111113022221} is an apocalyptic number.

It is an amenable number.

13111113022221 is a deficient number, since it is larger than the sum of its proper divisors (4752087409779).

13111113022221 is a wasteful number, since it uses less digits than its factorization.

13111113022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42429.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 13111113022221 its reverse (12222031111131), we get a palindrome (25333144133352).

The spelling of 13111113022221 in words is "thirteen trillion, one hundred eleven billion, one hundred thirteen million, twenty-two thousand, two hundred twenty-one".