111101112122220 has 288 divisors, whose sum is σ = 386360936881920. Its totient is φ = 25596232865280.

The previous prime is 111101112122173. The next prime is 111101112122261. The reversal of 111101112122220 is 22221211101111.

It is a happy number.

111101112122220 is a `hidden beast` number, since 11 + 110 + 111 + 212 + 2 + 220 = 666.

It is a super-2 number, since 2×111101112122220² (a number of 29 digits) contains 22 as substring.

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 = 111101112122193 and 111101112122202.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 14483910 + ... + 20784269.

It is an arithmetic number, because the mean of its divisors is an integer number (1341531030840).

Almost surely, 2^{111101112122220} is an apocalyptic number.

111101112122220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111101112122220 is an abundant number, since it is smaller than the sum of its proper divisors (275259824759700).

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

111101112122220 is a wasteful number, since it uses less digits than its factorization.

111101112122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35268285 (or 35268280 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111101112122220 its reverse (22221211101111), we get a palindrome (133322323223331).

It can be divided in two parts, 1111011 and 12122220, that added together give a palindrome (13233231).

The spelling of 111101112122220 in words is "one hundred eleven trillion, one hundred one billion, one hundred twelve million, one hundred twenty-two thousand, two hundred twenty".