111220097 has 2 divisors, whose sum is σ = 111220098. Its totient is φ = 111220096.

The previous prime is 111220079. The next prime is 111220117. The reversal of 111220097 is 790022111.

Together with previous prime (111220079) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81288256 + 29931841 = 9016^2 + 5471^2 .

It is an emirp because it is prime and its reverse (790022111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111220097 - 2¹⁸ = 110957953 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111220037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610048 + 55610049.

It is an arithmetic number, because the mean of its divisors is an integer number (55610049).

Almost surely, 2^111220097 is an apocalyptic number.

It is an amenable number.

111220097 is a deficient number, since it is larger than the sum of its proper divisors (1).

111220097 is an equidigital number, since it uses as much as digits as its factorization.

111220097 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 23.

The square root of 111220097 is about 10546.0939214479. The cubic root of 111220097 is about 480.9069902558.

The spelling of 111220097 in words is "one hundred eleven million, two hundred twenty thousand, ninety-seven".