21101200011200 has 168 divisors, whose sum is σ = 52937692486608. Its totient is φ = 8276728504320.

The previous prime is 21101200011193. The next prime is 21101200011209. The reversal of 21101200011200 is 211000210112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101200011209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19684259 + ... + 20728541.

Almost surely, 2^{21101200011200} is an apocalyptic number.

21101200011200 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 21101200011200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26468846243304).

21101200011200 is an abundant number, since it is smaller than the sum of its proper divisors (31836492475408).

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

21101200011200 is a wasteful number, since it uses less digits than its factorization.

21101200011200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044551 (or 1044536 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21101200011200 its reverse (211000210112), we get a palindrome (21312200221312).

The spelling of 21101200011200 in words is "twenty-one trillion, one hundred one billion, two hundred million, eleven thousand, two hundred".