111021635243 has 2 divisors, whose sum is σ = 111021635244. Its totient is φ = 111021635242.

The previous prime is 111021635203. The next prime is 111021635321. The reversal of 111021635243 is 342536120111.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111021635243 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (111021635203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510817621 + 55510817622.

It is an arithmetic number, because the mean of its divisors is an integer number (55510817622).

Almost surely, 2^111021635243 is an apocalyptic number.

111021635243 is a deficient number, since it is larger than the sum of its proper divisors (1).

111021635243 is an equidigital number, since it uses as much as digits as its factorization.

111021635243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 111021635243 its reverse (342536120111), we get a palindrome (453557755354).

The spelling of 111021635243 in words is "one hundred eleven billion, twenty-one million, six hundred thirty-five thousand, two hundred forty-three".