111522010561 has 4 divisors (see below), whose sum is σ = 120100626772. Its totient is φ = 102943394352.

The previous prime is 111522010531. The next prime is 111522010583. The reversal of 111522010561 is 165010225111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37502646336 + 74019364225 = 193656^2 + 272065^2 .

It is a cyclic number.

It is not a de Polignac number, because 111522010561 - 2⁵ = 111522010529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111522010531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4289308086 + ... + 4289308111.

It is an arithmetic number, because the mean of its divisors is an integer number (30025156693).

Almost surely, 2^111522010561 is an apocalyptic number.

It is an amenable number.

111522010561 is a deficient number, since it is larger than the sum of its proper divisors (8578616211).

111522010561 is an equidigital number, since it uses as much as digits as its factorization.

111522010561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8578616210.

The product of its (nonzero) digits is 600, while the sum is 25.

Adding to 111522010561 its reverse (165010225111), we get a palindrome (276532235672).

The spelling of 111522010561 in words is "one hundred eleven billion, five hundred twenty-two million, ten thousand, five hundred sixty-one".