111243424220 has 24 divisors (see below), whose sum is σ = 234718361808. Its totient is φ = 44286480000.

The previous prime is 111243424199. The next prime is 111243424241. The reversal of 111243424220 is 22424342111.

111243424220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (111243424199) and next prime (111243424241).

It is a super-4 number, since 4×111243424220⁴ (a number of 45 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111243424220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13176281 + ... + 13184720.

It is an arithmetic number, because the mean of its divisors is an integer number (9779931742).

Almost surely, 2^111243424220 is an apocalyptic number.

111243424220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111243424220 is an abundant number, since it is smaller than the sum of its proper divisors (123474937588).

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

111243424220 is a wasteful number, since it uses less digits than its factorization.

111243424220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26361221 (or 26361219 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 111243424220 its reverse (22424342111), we get a palindrome (133667766331).

The spelling of 111243424220 in words is "one hundred eleven billion, two hundred forty-three million, four hundred twenty-four thousand, two hundred twenty".