12021031171 has 2 divisors, whose sum is σ = 12021031172. Its totient is φ = 12021031170.

The previous prime is 12021031153. The next prime is 12021031181. The reversal of 12021031171 is 17113012021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12021031171 - 2²³ = 12012642563 is a prime.

It is not a weakly prime, because it can be changed into another prime (12021031181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010515585 + 6010515586.

It is an arithmetic number, because the mean of its divisors is an integer number (6010515586).

Almost surely, 2^12021031171 is an apocalyptic number.

12021031171 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021031171 is an equidigital number, since it uses as much as digits as its factorization.

12021031171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 19.

Adding to 12021031171 its reverse (17113012021), we get a palindrome (29134043192).

The spelling of 12021031171 in words is "twelve billion, twenty-one million, thirty-one thousand, one hundred seventy-one".