21120111011200 has 48 divisors (see below), whose sum is σ = 52173274240260. Its totient is φ = 8448044403200.

The previous prime is 21120111011137. The next prime is 21120111011239. The reversal of 21120111011200 is 211011102112.

It is a happy number.

It is a super-2 number, since 2×21120111011200² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3300014146 + ... + 3300020545.

Almost surely, 2^{21120111011200} is an apocalyptic number.

21120111011200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21120111011200 is an abundant number, since it is smaller than the sum of its proper divisors (31053163229060).

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

21120111011200 is an equidigital number, since it uses as much as digits as its factorization.

21120111011200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6600034715 (or 6600034698 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21120111011200 its reverse (211011102112), we get a palindrome (21331122113312).

The spelling of 21120111011200 in words is "twenty-one trillion, one hundred twenty billion, one hundred eleven million, eleven thousand, two hundred".