111205220640 has 96 divisors (see below), whose sum is σ = 350428389696. Its totient is φ = 29643555840.

The previous prime is 111205220597. The next prime is 111205220647. The reversal of 111205220640 is 46022502111.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 111205220640.

It is not an unprimeable number, because it can be changed into a prime (111205220647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1273419 + ... + 1357941.

It is an arithmetic number, because the mean of its divisors is an integer number (3650295726).

Almost surely, 2^111205220640 is an apocalyptic number.

111205220640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111205220640 is an abundant number, since it is smaller than the sum of its proper divisors (239223169056).

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

111205220640 is a wasteful number, since it uses less digits than its factorization.

111205220640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87282 (or 87274 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 111205220640 its reverse (46022502111), we get a palindrome (157227722751).

The spelling of 111205220640 in words is "one hundred eleven billion, two hundred five million, two hundred twenty thousand, six hundred forty".