12211234171 has 4 divisors (see below), whose sum is σ = 12471047712. Its totient is φ = 11951420632.

The previous prime is 12211234169. The next prime is 12211234193. The reversal of 12211234171 is 17143211221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12211234171 - 2¹ = 12211234169 is a prime.

It is a super-2 number, since 2×12211234171² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12211234111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129906700 + ... + 129906793.

It is an arithmetic number, because the mean of its divisors is an integer number (3117761928).

Almost surely, 2^12211234171 is an apocalyptic number.

12211234171 is a deficient number, since it is larger than the sum of its proper divisors (259813541).

12211234171 is an equidigital number, since it uses as much as digits as its factorization.

12211234171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259813540.

The product of its digits is 672, while the sum is 25.

Adding to 12211234171 its reverse (17143211221), we get a palindrome (29354445392).

The spelling of 12211234171 in words is "twelve billion, two hundred eleven million, two hundred thirty-four thousand, one hundred seventy-one".