13113221111 has 2 divisors, whose sum is σ = 13113221112. Its totient is φ = 13113221110.

The previous prime is 13113221087. The next prime is 13113221119. The reversal of 13113221111 is 11112231131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13113221111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13113221111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13113221119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6556610555 + 6556610556.

It is an arithmetic number, because the mean of its divisors is an integer number (6556610556).

Almost surely, 2^13113221111 is an apocalyptic number.

13113221111 is a deficient number, since it is larger than the sum of its proper divisors (1).

13113221111 is an equidigital number, since it uses as much as digits as its factorization.

13113221111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36, while the sum is 17.

Adding to 13113221111 its reverse (11112231131), we get a palindrome (24225452242).

The spelling of 13113221111 in words is "thirteen billion, one hundred thirteen million, two hundred twenty-one thousand, one hundred eleven".