111111011197 has 4 divisors (see below), whose sum is σ = 111124634236. Its totient is φ = 111097388160.

The previous prime is 111111011173. The next prime is 111111011201. The reversal of 111111011197 is 791110111111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59445266596 + 51665744601 = 243814^2 + 227301^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111111011197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111011117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6799278 + ... + 6815599.

It is an arithmetic number, because the mean of its divisors is an integer number (27781158559).

Almost surely, 2^111111011197 is an apocalyptic number.

It is an amenable number.

111111011197 is a deficient number, since it is larger than the sum of its proper divisors (13623039).

111111011197 is an equidigital number, since it uses as much as digits as its factorization.

111111011197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13623038.

The product of its (nonzero) digits is 63, while the sum is 25.

The spelling of 111111011197 in words is "one hundred eleven billion, one hundred eleven million, eleven thousand, one hundred ninety-seven".