111222221220020 has 24 divisors (see below), whose sum is σ = 233634150019368. Its totient is φ = 44476034115200.

The previous prime is 111222221220001. The next prime is 111222221220037. The reversal of 111222221220020 is 20022122222111.

It can be written as a sum of positive squares in 4 ways, for example, as 26845724613796 + 84376496606224 = 5181286^2 + 9185668^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 111222221219974 and 111222221220001.

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, 803327351 + ... + 803465790.

It is an arithmetic number, because the mean of its divisors is an integer number (9734756250807).

Almost surely, 2^{111222221220020} is an apocalyptic number.

111222221220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111222221220020 is an abundant number, since it is smaller than the sum of its proper divisors (122411928799348).

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

111222221220020 is a wasteful number, since it uses less digits than its factorization.

111222221220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606796611 (or 1606796609 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 111222221220020 its reverse (20022122222111), we get a palindrome (131244343442131).

The spelling of 111222221220020 in words is "one hundred eleven trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred twenty thousand, twenty".