12211212099997 has 2 divisors, whose sum is σ = 12211212099998. Its totient is φ = 12211212099996.

The previous prime is 12211212099979. The next prime is 12211212100039. The reversal of 12211212099997 is 79999021211221.

Together with previous prime (12211212099979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8778977888356 + 3432234211641 = 2962934^2 + 1852629^2 .

It is a cyclic number.

It is not a de Polignac number, because 12211212099997 - 2²³ = 12211203711389 is a prime.

It is a super-2 number, since 2×12211212099997² (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 (12211212099907) 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, 6105606049998 + 6105606049999.

It is an arithmetic number, because the mean of its divisors is an integer number (6105606049999).

Almost surely, 2^{12211212099997} is an apocalyptic number.

It is an amenable number.

12211212099997 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211212099997 is an equidigital number, since it uses as much as digits as its factorization.

12211212099997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 734832, while the sum is 55.

The spelling of 12211212099997 in words is "twelve trillion, two hundred eleven billion, two hundred twelve million, ninety-nine thousand, nine hundred ninety-seven".