1121112221220 has 216 divisors, whose sum is σ = 3722047789824. Its totient is φ = 283227907392.

The previous prime is 1121112221183. The next prime is 1121112221231. The reversal of 1121112221220 is 221222111211.

1121112221220 is a `hidden beast` number, since 1 + 1 + 211 + 12 + 221 + 220 = 666.

It is a super-2 number, since 2×1121112221220² (a number of 25 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 = 1121112221193 and 1121112221202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1434957 + ... + 2073963.

Almost surely, 2^{1121112221220} is an apocalyptic number.

1121112221220 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 1121112221220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1861023894912).

1121112221220 is an abundant number, since it is smaller than the sum of its proper divisors (2600935568604).

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

1121112221220 is a wasteful number, since it uses less digits than its factorization.

1121112221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639069 (or 639036 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1121112221220 its reverse (221222111211), we get a palindrome (1342334332431).

The spelling of 1121112221220 in words is "one trillion, one hundred twenty-one billion, one hundred twelve million, two hundred twenty-one thousand, two hundred twenty".