12111221001097 has 2 divisors, whose sum is σ = 12111221001098. Its totient is φ = 12111221001096.

The previous prime is 12111221001071. The next prime is 12111221001167. The reversal of 12111221001097 is 79010012211121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11840591112256 + 270629888841 = 3441016^2 + 520221^2 .

It is a cyclic number.

It is not a de Polignac number, because 12111221001097 - 2¹¹ = 12111220999049 is a prime.

It is not a weakly prime, because it can be changed into another prime (12111221001037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055610500548 + 6055610500549.

It is an arithmetic number, because the mean of its divisors is an integer number (6055610500549).

Almost surely, 2^{12111221001097} is an apocalyptic number.

It is an amenable number.

12111221001097 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111221001097 is an equidigital number, since it uses as much as digits as its factorization.

12111221001097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 28.

The spelling of 12111221001097 in words is "twelve trillion, one hundred eleven billion, two hundred twenty-one million, one thousand, ninety-seven".