21201110112000 has 2304 divisors, whose sum is σ = 89991032721408. Its totient is φ = 4304594534400.

The previous prime is 21201110111999. The next prime is 21201110112019. The reversal of 21201110112000 is 21101110212.

It is a super-2 number, since 2×21201110112000² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 34585823694 + ... + 34585824306.

It is an arithmetic number, because the mean of its divisors is an integer number (39058607952).

Almost surely, 2^{21201110112000} is an apocalyptic number.

21201110112000 is a gapful number since it is divisible by the number (20) 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 21201110112000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44995516360704).

21201110112000 is an abundant number, since it is smaller than the sum of its proper divisors (68789922609408).

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

21201110112000 is a wasteful number, since it uses less digits than its factorization.

21201110112000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811 (or 787 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21201110112000 its reverse (21101110212), we get a palindrome (21222211222212).

The spelling of 21201110112000 in words is "twenty-one trillion, two hundred one billion, one hundred ten million, one hundred twelve thousand".