111112211222120 has 16 divisors (see below), whose sum is σ = 250002475249860. Its totient is φ = 44444884488832.

The previous prime is 111112211222113. The next prime is 111112211222197. The reversal of 111112211222120 is 21222112211111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 103707053199556 + 7405158022564 = 10183666^2 + 2721242^2 .

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 = 111112211222092 and 111112211222101.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1388902640237 + ... + 1388902640316.

Almost surely, 2^{111112211222120} is an apocalyptic number.

111112211222120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111112211222120 is an abundant number, since it is smaller than the sum of its proper divisors (138890264027740).

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

111112211222120 is a wasteful number, since it uses less digits than its factorization.

111112211222120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2777805280564 (or 2777805280560 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 111112211222120 its reverse (21222112211111), we get a palindrome (132334323433231).

The spelling of 111112211222120 in words is "one hundred eleven trillion, one hundred twelve billion, two hundred eleven million, two hundred twenty-two thousand, one hundred twenty".