111216551216 has 20 divisors (see below), whose sum is σ = 215510295000. Its totient is φ = 55600991232.

The previous prime is 111216551213. The next prime is 111216551249. The reversal of 111216551216 is 612155612111.

It is not an unprimeable number, because it can be changed into a prime (111216551213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328241 + ... + 574608.

It is an arithmetic number, because the mean of its divisors is an integer number (10775514750).

Almost surely, 2^111216551216 is an apocalyptic number.

111216551216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

111216551216 is a deficient number, since it is larger than the sum of its proper divisors (104293743784).

111216551216 is an equidigital number, since it uses as much as digits as its factorization.

111216551216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910556 (or 910550 counting only the distinct ones).

The product of its digits is 3600, while the sum is 32.

The spelling of 111216551216 in words is "one hundred eleven billion, two hundred sixteen million, five hundred fifty-one thousand, two hundred sixteen".