12122121999997 has 2 divisors, whose sum is σ = 12122121999998. Its totient is φ = 12122121999996.

The previous prime is 12122121999989. The next prime is 12122122000049. The reversal of 12122121999997 is 79999912122121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10228157026201 + 1893964973796 = 3198149^2 + 1376214^2 .

It is a cyclic number.

It is not a de Polignac number, because 12122121999997 - 2³ = 12122121999989 is a prime.

It is a super-2 number, since 2×12122121999997² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12122121991997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061060999998 + 6061060999999.

It is an arithmetic number, because the mean of its divisors is an integer number (6061060999999).

Almost surely, 2^{12122121999997} is an apocalyptic number.

It is an amenable number.

12122121999997 is a deficient number, since it is larger than the sum of its proper divisors (1).

12122121999997 is an equidigital number, since it uses as much as digits as its factorization.

12122121999997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6613488, while the sum is 64.

The spelling of 12122121999997 in words is "twelve trillion, one hundred twenty-two billion, one hundred twenty-one million, nine hundred ninety-nine thousand, nine hundred ninety-seven".