11112220221097 has 2 divisors, whose sum is σ = 11112220221098. Its totient is φ = 11112220221096.

The previous prime is 11112220221001. The next prime is 11112220221127. The reversal of 11112220221097 is 79012202221111.

11112220221097 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8940195680256 + 2172024540841 = 2990016^2 + 1473779^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11112220221097 is a prime.

It is not a weakly prime, because it can be changed into another prime (11112220221997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556110110548 + 5556110110549.

It is an arithmetic number, because the mean of its divisors is an integer number (5556110110549).

Almost surely, 2^{11112220221097} is an apocalyptic number.

It is an amenable number.

11112220221097 is a deficient number, since it is larger than the sum of its proper divisors (1).

11112220221097 is an equidigital number, since it uses as much as digits as its factorization.

11112220221097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 31.

The spelling of 11112220221097 in words is "eleven trillion, one hundred twelve billion, two hundred twenty million, two hundred twenty-one thousand, ninety-seven".