111053221224521 has 4 divisors (see below), whose sum is σ = 111338705084100. Its totient is φ = 110767737364944.

The previous prime is 111053221224493. The next prime is 111053221224551. The reversal of 111053221224521 is 125422122350111.

It is a happy number.

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 38320296934921 + 72732924289600 = 6190339^2 + 8528360^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111053221224521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111053221224551) 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, 142741929206 + ... + 142741929983.

It is an arithmetic number, because the mean of its divisors is an integer number (27834676271025).

Almost surely, 2^{111053221224521} is an apocalyptic number.

It is an amenable number.

111053221224521 is a deficient number, since it is larger than the sum of its proper divisors (285483859579).

111053221224521 is an equidigital number, since it uses as much as digits as its factorization.

111053221224521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285483859578.

The product of its (nonzero) digits is 9600, while the sum is 32.

Adding to 111053221224521 its reverse (125422122350111), we get a palindrome (236475343574632).

The spelling of 111053221224521 in words is "one hundred eleven trillion, fifty-three billion, two hundred twenty-one million, two hundred twenty-four thousand, five hundred twenty-one".