111223231020 has 72 divisors (see below), whose sum is σ = 368047789200. Its totient is φ = 26963207040.

The previous prime is 111223231001. The next prime is 111223231057. The reversal of 111223231020 is 20132322111.

111223231020 is a `hidden beast` number, since 111 + 223 + 2 + 310 + 20 = 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 = 111223230984 and 111223231002.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28084695 + ... + 28088654.

It is an arithmetic number, because the mean of its divisors is an integer number (5111774850).

Almost surely, 2^111223231020 is an apocalyptic number.

111223231020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111223231020 is an abundant number, since it is smaller than the sum of its proper divisors (256824558180).

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

111223231020 is a wasteful number, since it uses less digits than its factorization.

111223231020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56173375 (or 56173370 counting only the distinct ones).

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

Adding to 111223231020 its reverse (20132322111), we get a palindrome (131355553131).

It can be divided in two parts, 111223 and 231020, that added together give a palindrome (342243).

The spelling of 111223231020 in words is "one hundred eleven billion, two hundred twenty-three million, two hundred thirty-one thousand, twenty".