21112012221120 has 112 divisors (see below), whose sum is σ = 74478487588320. Its totient is φ = 5629869923328.

The previous prime is 21112012221073. The next prime is 21112012221143. The reversal of 21112012221120 is 2112221021112.

21112012221120 is a `hidden beast` number, since 211 + 1 + 201 + 22 + 211 + 20 = 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 = 21112012221093 and 21112012221102.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1221751327 + ... + 1221768606.

Almost surely, 2^{21112012221120} is an apocalyptic number.

21112012221120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21112012221120 is an abundant number, since it is smaller than the sum of its proper divisors (53366475367200).

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

21112012221120 is a wasteful number, since it uses less digits than its factorization.

21112012221120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443519959 (or 2443519943 counting only the distinct ones).

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

Adding to 21112012221120 its reverse (2112221021112), we get a palindrome (23224233242232).

The spelling of 21112012221120 in words is "twenty-one trillion, one hundred twelve billion, twelve million, two hundred twenty-one thousand, one hundred twenty".