12042121171 has 2 divisors, whose sum is σ = 12042121172. Its totient is φ = 12042121170.

The previous prime is 12042121141. The next prime is 12042121177. The reversal of 12042121171 is 17112124021.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12042121171 - 2⁹ = 12042120659 is a prime.

It is a super-2 number, since 2×12042121171² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12042121177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6021060585 + 6021060586.

It is an arithmetic number, because the mean of its divisors is an integer number (6021060586).

Almost surely, 2^12042121171 is an apocalyptic number.

12042121171 is a deficient number, since it is larger than the sum of its proper divisors (1).

12042121171 is an equidigital number, since it uses as much as digits as its factorization.

12042121171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 22.

Adding to 12042121171 its reverse (17112124021), we get a palindrome (29154245192).

The spelling of 12042121171 in words is "twelve billion, forty-two million, one hundred twenty-one thousand, one hundred seventy-one".