111352544521 has 4 divisors (see below), whose sum is σ = 111411808000. Its totient is φ = 111293281044.

The previous prime is 111352544507. The next prime is 111352544531. The reversal of 111352544521 is 125445253111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 125445253111 = 190051 ⋅660061.

It is a cyclic number.

It is not a de Polignac number, because 111352544521 - 2⁷ = 111352544393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111352544531) 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 in 3 ways as a sum of consecutive naturals, for example, 29628921 + ... + 29632678.

It is an arithmetic number, because the mean of its divisors is an integer number (27852952000).

Almost surely, 2^111352544521 is an apocalyptic number.

It is an amenable number.

111352544521 is a deficient number, since it is larger than the sum of its proper divisors (59263479).

111352544521 is an equidigital number, since it uses as much as digits as its factorization.

111352544521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59263478.

The product of its digits is 24000, while the sum is 34.

Adding to 111352544521 its reverse (125445253111), we get a palindrome (236797797632).

The spelling of 111352544521 in words is "one hundred eleven billion, three hundred fifty-two million, five hundred forty-four thousand, five hundred twenty-one".