111455421503 has 4 divisors (see below), whose sum is σ = 111458430288. Its totient is φ = 111452412720.

The previous prime is 111455421491. The next prime is 111455421547. The reversal of 111455421503 is 305124554111.

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

It is a cyclic number.

It is not a de Polignac number, because 111455421503 - 2⁶ = 111455421439 is a prime.

It is a super-3 number, since 3×111455421503³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 111455421503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111455421593) 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, 1448126 + ... + 1523147.

It is an arithmetic number, because the mean of its divisors is an integer number (27864607572).

Almost surely, 2^111455421503 is an apocalyptic number.

111455421503 is a deficient number, since it is larger than the sum of its proper divisors (3008785).

111455421503 is an equidigital number, since it uses as much as digits as its factorization.

111455421503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3008784.

The product of its (nonzero) digits is 12000, while the sum is 32.

Adding to 111455421503 its reverse (305124554111), we get a palindrome (416579975614).

The spelling of 111455421503 in words is "one hundred eleven billion, four hundred fifty-five million, four hundred twenty-one thousand, five hundred three".