111230545220 has 12 divisors (see below), whose sum is σ = 233584145004. Its totient is φ = 44492218080.

The previous prime is 111230545211. The next prime is 111230545273. The reversal of 111230545220 is 22545032111.

It can be written as a sum of positive squares in 2 ways, for example, as 39380814916 + 71849730304 = 198446^2 + 268048^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 111230545220.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2780763611 + ... + 2780763650.

It is an arithmetic number, because the mean of its divisors is an integer number (19465345417).

Almost surely, 2^111230545220 is an apocalyptic number.

111230545220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111230545220 is an abundant number, since it is smaller than the sum of its proper divisors (122353599784).

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

111230545220 is a wasteful number, since it uses less digits than its factorization.

111230545220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5561527270 (or 5561527268 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 111230545220 its reverse (22545032111), we get a palindrome (133775577331).

The spelling of 111230545220 in words is "one hundred eleven billion, two hundred thirty million, five hundred forty-five thousand, two hundred twenty".