111312230220 has 72 divisors (see below), whose sum is σ = 337903806240. Its totient is φ = 29660693760.

The previous prime is 111312230207. The next prime is 111312230221. The reversal of 111312230220 is 22032213111.

111312230220 is a `hidden beast` number, since 111 + 312 + 23 + 0 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 111312230193 and 111312230202.

It is not an unprimeable number, because it can be changed into a prime (111312230221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3000 + ... + 471840.

It is an arithmetic number, because the mean of its divisors is an integer number (4693108420).

Almost surely, 2^111312230220 is an apocalyptic number.

111312230220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111312230220 is an abundant number, since it is smaller than the sum of its proper divisors (226591576020).

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

111312230220 is a wasteful number, since it uses less digits than its factorization.

111312230220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470175 (or 470170 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 111312230220 its reverse (22032213111), we get a palindrome (133344443331).

The spelling of 111312230220 in words is "one hundred eleven billion, three hundred twelve million, two hundred thirty thousand, two hundred twenty".