1111221111097 has 2 divisors, whose sum is σ = 1111221111098. Its totient is φ = 1111221111096.

The previous prime is 1111221111047. The next prime is 1111221111151. The reversal of 1111221111097 is 7901111221111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 699396017401 + 411825093696 = 836299^2 + 641736^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111221111097 - 2³⁵ = 1076861372729 is a prime.

It is not a weakly prime, because it can be changed into another prime (1111221111047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555610555548 + 555610555549.

It is an arithmetic number, because the mean of its divisors is an integer number (555610555549).

Almost surely, 2^{1111221111097} is an apocalyptic number.

It is an amenable number.

1111221111097 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111221111097 is an equidigital number, since it uses as much as digits as its factorization.

1111221111097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 28.

The spelling of 1111221111097 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, one hundred eleven thousand, ninety-seven".