111222100202220 has 288 divisors, whose sum is σ = 386307474448896. Its totient is φ = 25373609856000.

The previous prime is 111222100202201. The next prime is 111222100202243. The reversal of 111222100202220 is 22202001222111.

It is a happy number.

111222100202220 is a `hidden beast` number, since 1 + 11 + 22 + 210 + 0 + 202 + 220 = 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 = 111222100202193 and 111222100202202.

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, 1511934240 + ... + 1512007800.

It is an arithmetic number, because the mean of its divisors is an integer number (1341345397392).

Almost surely, 2^{111222100202220} is an apocalyptic number.

111222100202220 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 111222100202220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193153737224448).

111222100202220 is an abundant number, since it is smaller than the sum of its proper divisors (275085374246676).

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

111222100202220 is a wasteful number, since it uses less digits than its factorization.

111222100202220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75861 (or 75856 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 111222100202220 its reverse (22202001222111), we get a palindrome (133424101424331).

The spelling of 111222100202220 in words is "one hundred eleven trillion, two hundred twenty-two billion, one hundred million, two hundred two thousand, two hundred twenty".