111123346657 has 2 divisors, whose sum is σ = 111123346658. Its totient is φ = 111123346656.

The previous prime is 111123346637. The next prime is 111123346673. The reversal of 111123346657 is 756643321111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108067357696 + 3055988961 = 328736^2 + 55281^2 .

It is an emirp because it is prime and its reverse (756643321111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111123346657 is a prime.

It is not a weakly prime, because it can be changed into another prime (111123346637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55561673328 + 55561673329.

It is an arithmetic number, because the mean of its divisors is an integer number (55561673329).

Almost surely, 2^111123346657 is an apocalyptic number.

It is an amenable number.

111123346657 is a deficient number, since it is larger than the sum of its proper divisors (1).

111123346657 is an equidigital number, since it uses as much as digits as its factorization.

111123346657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 40.

Adding to 111123346657 its reverse (756643321111), we get a palindrome (867766667768).

The spelling of 111123346657 in words is "one hundred eleven billion, one hundred twenty-three million, three hundred forty-six thousand, six hundred fifty-seven".