13211111 has 2 divisors, whose sum is σ = 13211112. Its totient is φ = 13211110.

The previous prime is 13211101. The next prime is 13211113. The reversal of 13211111 is 11111231.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13211111 - 2¹⁸ = 12948967 is a prime.

Together with 13211113, it forms a pair of twin primes.

It is a Chen prime.

13211111 is a modest number, since divided by 11111 gives 132 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 13211092 and 13211101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13211113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6605555 + 6605556.

It is an arithmetic number, because the mean of its divisors is an integer number (6605556).

Almost surely, 2^13211111 is an apocalyptic number.

13211111 is a deficient number, since it is larger than the sum of its proper divisors (1).

13211111 is an equidigital number, since it uses as much as digits as its factorization.

13211111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6, while the sum is 11.

The square root of 13211111 is about 3634.7092043243. The cubic root of 13211111 is about 236.3994420430.

Adding to 13211111 its reverse (11111231), we get a palindrome (24322342).

The spelling of 13211111 in words is "thirteen million, two hundred eleven thousand, one hundred eleven".