12172322111 has 2 divisors, whose sum is σ = 12172322112. Its totient is φ = 12172322110.

The previous prime is 12172322093. The next prime is 12172322159. The reversal of 12172322111 is 11122327121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12172322111 - 2¹⁴ = 12172305727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12172322161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6086161055 + 6086161056.

It is an arithmetic number, because the mean of its divisors is an integer number (6086161056).

Almost surely, 2^12172322111 is an apocalyptic number.

12172322111 is a deficient number, since it is larger than the sum of its proper divisors (1).

12172322111 is an equidigital number, since it uses as much as digits as its factorization.

12172322111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 23.

Adding to 12172322111 its reverse (11122327121), we get a palindrome (23294649232).

The spelling of 12172322111 in words is "twelve billion, one hundred seventy-two million, three hundred twenty-two thousand, one hundred eleven".