11112211021097 has 2 divisors, whose sum is σ = 11112211021098. Its totient is φ = 11112211021096.

The previous prime is 11112211021091. The next prime is 11112211021123. The reversal of 11112211021097 is 79012011221111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10946675147776 + 165535873321 = 3308576^2 + 406861^2 .

It is a cyclic number.

It is not a de Polignac number, because 11112211021097 - 2⁴ = 11112211021081 is a prime.

It is not a weakly prime, because it can be changed into another prime (11112211021091) 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, 5556105510548 + 5556105510549.

It is an arithmetic number, because the mean of its divisors is an integer number (5556105510549).

Almost surely, 2^{11112211021097} is an apocalyptic number.

It is an amenable number.

11112211021097 is a deficient number, since it is larger than the sum of its proper divisors (1).

11112211021097 is an equidigital number, since it uses as much as digits as its factorization.

11112211021097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 29.

The spelling of 11112211021097 in words is "eleven trillion, one hundred twelve billion, two hundred eleven million, twenty-one thousand, ninety-seven".