111212110121171 has 2 divisors, whose sum is σ = 111212110121172. Its totient is φ = 111212110121170.

The previous prime is 111212110121143. The next prime is 111212110121197. The reversal of 111212110121171 is 171121011212111.

It is a strong prime.

It is an emirp because it is prime and its reverse (171121011212111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111212110121171 - 2¹⁴ = 111212110104787 is a prime.

It is a super-2 number, since 2×111212110121171² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111212110121471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55606055060585 + 55606055060586.

It is an arithmetic number, because the mean of its divisors is an integer number (55606055060586).

Almost surely, 2^{111212110121171} is an apocalyptic number.

111212110121171 is a deficient number, since it is larger than the sum of its proper divisors (1).

111212110121171 is an equidigital number, since it uses as much as digits as its factorization.

111212110121171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 23.

Adding to 111212110121171 its reverse (171121011212111), we get a palindrome (282333121333282).

The spelling of 111212110121171 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred ten million, one hundred twenty-one thousand, one hundred seventy-one".