111045023521 has 2 divisors, whose sum is σ = 111045023522. Its totient is φ = 111045023520.

The previous prime is 111045023513. The next prime is 111045023539. The reversal of 111045023521 is 125320540111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92951814400 + 18093209121 = 304880^2 + 134511^2 .

It is a cyclic number.

It is not a de Polignac number, because 111045023521 - 2³ = 111045023513 is a prime.

It is not a weakly prime, because it can be changed into another prime (111045023021) 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, 55522511760 + 55522511761.

It is an arithmetic number, because the mean of its divisors is an integer number (55522511761).

Almost surely, 2^111045023521 is an apocalyptic number.

It is an amenable number.

111045023521 is a deficient number, since it is larger than the sum of its proper divisors (1).

111045023521 is an equidigital number, since it uses as much as digits as its factorization.

111045023521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 111045023521 its reverse (125320540111), we get a palindrome (236365563632).

The spelling of 111045023521 in words is "one hundred eleven billion, forty-five million, twenty-three thousand, five hundred twenty-one".