12211111101997 has 2 divisors, whose sum is σ = 12211111101998. Its totient is φ = 12211111101996.

The previous prime is 12211111101991. The next prime is 12211111102147. The reversal of 12211111101997 is 79910111111221.

12211111101997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10164325927716 + 2046785174281 = 3188154^2 + 1430659^2 .

It is a cyclic number.

It is not a de Polignac number, because 12211111101997 - 2⁷ = 12211111101869 is a prime.

It is a super-2 number, since 2×12211111101997² (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 (12211111101991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105555550998 + 6105555550999.

It is an arithmetic number, because the mean of its divisors is an integer number (6105555550999).

Almost surely, 2^{12211111101997} is an apocalyptic number.

It is an amenable number.

12211111101997 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211111101997 is an equidigital number, since it uses as much as digits as its factorization.

12211111101997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 37.

The spelling of 12211111101997 in words is "twelve trillion, two hundred eleven billion, one hundred eleven million, one hundred one thousand, nine hundred ninety-seven".