111820307220 has 120 divisors (see below), whose sum is σ = 353547177984. Its totient is φ = 29583900864.

The previous prime is 111820307191. The next prime is 111820307239. The reversal of 111820307220 is 22703028111.

111820307220 is a `hidden beast` number, since 1 + 118 + 20 + 307 + 220 = 666.

It is a super-2 number, since 2×111820307220² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 66012 + ... + 477491.

Almost surely, 2^111820307220 is an apocalyptic number.

111820307220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111820307220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176773588992).

111820307220 is an abundant number, since it is smaller than the sum of its proper divisors (241726870764).

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

111820307220 is a wasteful number, since it uses less digits than its factorization.

111820307220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543651 (or 543640 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The spelling of 111820307220 in words is "one hundred eleven billion, eight hundred twenty million, three hundred seven thousand, two hundred twenty".