111261043242500 has 60 divisors (see below), whose sum is σ = 243361618338300. Its totient is φ = 44494179696000.

The previous prime is 111261043242473. The next prime is 111261043242563. The reversal of 111261043242500 is 5242340162111.

It can be written as a sum of positive squares in 10 ways, for example, as 108753361966144 + 2507681276356 = 10428488^2 + 1583566^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5755874 + ... + 15989126.

It is an arithmetic number, because the mean of its divisors is an integer number (4056026972305).

Almost surely, 2^{111261043242500} is an apocalyptic number.

111261043242500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111261043242500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121680809169150).

111261043242500 is an abundant number, since it is smaller than the sum of its proper divisors (132100575095800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111261043242500 is a wasteful number, since it uses less digits than its factorization.

111261043242500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10237626 (or 10237609 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The spelling of 111261043242500 in words is "one hundred eleven trillion, two hundred sixty-one billion, forty-three million, two hundred forty-two thousand, five hundred".