111512551603 has 16 divisors (see below), whose sum is σ = 119024493984. Its totient is φ = 104109834240.

The previous prime is 111512551583. The next prime is 111512551609. The reversal of 111512551603 is 306155215111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 111512551603 - 2¹³ = 111512543411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111512551609) 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 15 ways as a sum of consecutive naturals, for example, 999976 + ... + 1105882.

It is an arithmetic number, because the mean of its divisors is an integer number (7439030874).

Almost surely, 2^111512551603 is an apocalyptic number.

111512551603 is a deficient number, since it is larger than the sum of its proper divisors (7511942381).

111512551603 is a wasteful number, since it uses less digits than its factorization.

111512551603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106422.

The product of its (nonzero) digits is 4500, while the sum is 31.

Adding to 111512551603 its reverse (306155215111), we get a palindrome (417667766714).

The spelling of 111512551603 in words is "one hundred eleven billion, five hundred twelve million, five hundred fifty-one thousand, six hundred three".