111021811393 has 2 divisors, whose sum is σ = 111021811394. Its totient is φ = 111021811392.

The previous prime is 111021811361. The next prime is 111021811399. The reversal of 111021811393 is 393118120111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84481491649 + 26540319744 = 290657^2 + 162912^2 .

It is a cyclic number.

It is not a de Polignac number, because 111021811393 - 2⁵ = 111021811361 is a prime.

It is not a weakly prime, because it can be changed into another prime (111021811399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510905696 + 55510905697.

It is an arithmetic number, because the mean of its divisors is an integer number (55510905697).

Almost surely, 2^111021811393 is an apocalyptic number.

It is an amenable number.

111021811393 is a deficient number, since it is larger than the sum of its proper divisors (1).

111021811393 is an equidigital number, since it uses as much as digits as its factorization.

111021811393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 31.

The spelling of 111021811393 in words is "one hundred eleven billion, twenty-one million, eight hundred eleven thousand, three hundred ninety-three".