111201109997 has 2 divisors, whose sum is σ = 111201109998. Its totient is φ = 111201109996.

The previous prime is 111201109979. The next prime is 111201110017. The reversal of 111201109997 is 799901102111.

It is a happy number.

Together with previous prime (111201109979) 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., 107614178116 + 3586931881 = 328046^2 + 59891^2 .

It is a cyclic number.

It is not a de Polignac number, because 111201109997 - 2¹⁰ = 111201108973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111201109927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55600554998 + 55600554999.

It is an arithmetic number, because the mean of its divisors is an integer number (55600554999).

Almost surely, 2^111201109997 is an apocalyptic number.

It is an amenable number.

111201109997 is a deficient number, since it is larger than the sum of its proper divisors (1).

111201109997 is an equidigital number, since it uses as much as digits as its factorization.

111201109997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 41.

The spelling of 111201109997 in words is "one hundred eleven billion, two hundred one million, one hundred nine thousand, nine hundred ninety-seven".