111220111112112 has 120 divisors (see below), whose sum is σ = 319703042348976. Its totient is φ = 36068146518528.

The previous prime is 111220111112101. The next prime is 111220111112177. The reversal of 111220111112112 is 211211111022111.

111220111112112 is a `hidden beast` number, since 111 + 220 + 11 + 111 + 211 + 2 = 666.

It is a super-3 number, since 3×111220111112112³ (a number of 43 digits) contains 333 as substring.

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

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, 58725463 + ... + 60589769.

Almost surely, 2^{111220111112112} is an apocalyptic number.

111220111112112 is a gapful number since it is divisible by the number (12) 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 111220111112112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159851521174488).

111220111112112 is an abundant number, since it is smaller than the sum of its proper divisors (208482931236864).

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

111220111112112 is a wasteful number, since it uses less digits than its factorization.

111220111112112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1875555 (or 1875546 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 18.

Adding to 111220111112112 its reverse (211211111022111), we get a palindrome (322431222134223).

Subtracting 111220111112112 from its reverse (211211111022111), we obtain a palindrome (99990999909999).

The spelling of 111220111112112 in words is "one hundred eleven trillion, two hundred twenty billion, one hundred eleven million, one hundred twelve thousand, one hundred twelve".