12121123271 has 2 divisors, whose sum is σ = 12121123272. Its totient is φ = 12121123270.

The previous prime is 12121123247. The next prime is 12121123291. The reversal of 12121123271 is 17232112121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12121123271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12121123291) 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, 6060561635 + 6060561636.

It is an arithmetic number, because the mean of its divisors is an integer number (6060561636).

Almost surely, 2^12121123271 is an apocalyptic number.

12121123271 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121123271 is an equidigital number, since it uses as much as digits as its factorization.

12121123271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 23.

Adding to 12121123271 its reverse (17232112121), we get a palindrome (29353235392).

The spelling of 12121123271 in words is "twelve billion, one hundred twenty-one million, one hundred twenty-three thousand, two hundred seventy-one".