12021011312171 has 2 divisors, whose sum is σ = 12021011312172. Its totient is φ = 12021011312170.

The previous prime is 12021011312131. The next prime is 12021011312197. The reversal of 12021011312171 is 17121311012021.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12021011312171 is a prime.

It is not a weakly prime, because it can be changed into another prime (12021011312131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010505656085 + 6010505656086.

It is an arithmetic number, because the mean of its divisors is an integer number (6010505656086).

Almost surely, 2^{12021011312171} is an apocalyptic number.

12021011312171 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021011312171 is an equidigital number, since it uses as much as digits as its factorization.

12021011312171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 23.

Adding to 12021011312171 its reverse (17121311012021), we get a palindrome (29142322324192).

The spelling of 12021011312171 in words is "twelve trillion, twenty-one billion, eleven million, three hundred twelve thousand, one hundred seventy-one".