111140435521 has 4 divisors (see below), whose sum is σ = 111533158192. Its totient is φ = 110747712852.

The previous prime is 111140435503. The next prime is 111140435551. The reversal of 111140435521 is 125534041111.

It is a happy number.

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: 125534041111 = 1249 ⋅100507639.

It is a cyclic number.

It is not a de Polignac number, because 111140435521 - 2¹³ = 111140427329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111140435521.

It is not an unprimeable number, because it can be changed into a prime (111140435551) 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, 196360911 + ... + 196361476.

It is an arithmetic number, because the mean of its divisors is an integer number (27883289548).

Almost surely, 2^111140435521 is an apocalyptic number.

It is an amenable number.

111140435521 is a deficient number, since it is larger than the sum of its proper divisors (392722671).

111140435521 is an equidigital number, since it uses as much as digits as its factorization.

111140435521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392722670.

The product of its (nonzero) digits is 2400, while the sum is 28.

Adding to 111140435521 its reverse (125534041111), we get a palindrome (236674476632).

The spelling of 111140435521 in words is "one hundred eleven billion, one hundred forty million, four hundred thirty-five thousand, five hundred twenty-one".