111213655545 has 32 divisors (see below), whose sum is σ = 178750854144. Its totient is φ = 59044708800.

The previous prime is 111213655523. The next prime is 111213655547. The reversal of 111213655545 is 545556312111.

It is not a de Polignac number, because 111213655545 - 2⁵ = 111213655513 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (111213655547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4363890 + ... + 4389300.

It is an arithmetic number, because the mean of its divisors is an integer number (5585964192).

Almost surely, 2^111213655545 is an apocalyptic number.

111213655545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

111213655545 is a deficient number, since it is larger than the sum of its proper divisors (67537198599).

111213655545 is a wasteful number, since it uses less digits than its factorization.

111213655545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26733.

The product of its digits is 90000, while the sum is 39.

Adding to 111213655545 its reverse (545556312111), we get a palindrome (656769967656).

The spelling of 111213655545 in words is "one hundred eleven billion, two hundred thirteen million, six hundred fifty-five thousand, five hundred forty-five".