21102111011200 has 48 divisors (see below), whose sum is σ = 52128808615260. Its totient is φ = 8440844403200.

The previous prime is 21102111011183. The next prime is 21102111011207. The reversal of 21102111011200 is 211011120112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102111011207) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3297201646 + ... + 3297208045.

Almost surely, 2^{21102111011200} is an apocalyptic number.

21102111011200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21102111011200 is an abundant number, since it is smaller than the sum of its proper divisors (31026697604060).

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

21102111011200 is an equidigital number, since it uses as much as digits as its factorization.

21102111011200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6594409715 (or 6594409698 counting only the distinct ones).

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

Adding to 21102111011200 its reverse (211011120112), we get a palindrome (21313122131312).

The spelling of 21102111011200 in words is "twenty-one trillion, one hundred two billion, one hundred eleven million, eleven thousand, two hundred".