111221197 has 2 divisors, whose sum is σ = 111221198. Its totient is φ = 111221196.

The previous prime is 111221167. The next prime is 111221207. The reversal of 111221197 is 791122111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99620361 + 11600836 = 9981^2 + 3406^2 .

It is a cyclic number.

It is not a de Polignac number, because 111221197 - 2¹¹ = 111219149 is a prime.

It is a super-2 number, since 2×111221197² = 24740309324225618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111221167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610598 + 55610599.

It is an arithmetic number, because the mean of its divisors is an integer number (55610599).

Almost surely, 2^111221197 is an apocalyptic number.

It is an amenable number.

111221197 is a deficient number, since it is larger than the sum of its proper divisors (1).

111221197 is an equidigital number, since it uses as much as digits as its factorization.

111221197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 252, while the sum is 25.

The square root of 111221197 is about 10546.1460733293. The cubic root of 111221197 is about 480.9085756885.

The spelling of 111221197 in words is "one hundred eleven million, two hundred twenty-one thousand, one hundred ninety-seven".