111123357789999 has 16 divisors (see below), whose sum is σ = 157101020628480. Its totient is φ = 69670887399360.

The previous prime is 111123357789971. The next prime is 111123357790001. The reversal of 111123357789999 is 999987753321111.

It is not a de Polignac number, because 111123357789999 - 2⁵ = 111123357789967 is a prime.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 111123357789999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111123357789919) by changing a digit.

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

It is an upside-down number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7115074647 + ... + 7115090264.

It is an arithmetic number, because the mean of its divisors is an integer number (9818813789280).

Almost surely, 2^{111123357789999} is an apocalyptic number.

111123357789999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

111123357789999 is a deficient number, since it is larger than the sum of its proper divisors (45977662838481).

111123357789999 is a wasteful number, since it uses less digits than its factorization.

111123357789999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14230165070.

The product of its digits is 231472080, while the sum is 75.

The spelling of 111123357789999 in words is "one hundred eleven trillion, one hundred twenty-three billion, three hundred fifty-seven million, seven hundred eighty-nine thousand, nine hundred ninety-nine".