21112020020200 has 384 divisors, whose sum is σ = 53304713280000. Its totient is φ = 7746990325760.

The previous prime is 21112020020191. The next prime is 21112020020209. The reversal of 21112020020200 is 202002021112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21112020020191) and next prime (21112020020209).

It is not an unprimeable number, because it can be changed into a prime (21112020020209) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12896773782 + ... + 12896775418.

It is an arithmetic number, because the mean of its divisors is an integer number (138814357500).

Almost surely, 2^{21112020020200} is an apocalyptic number.

21112020020200 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 21112020020200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26652356640000).

21112020020200 is an abundant number, since it is smaller than the sum of its proper divisors (32192693259800).

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

21112020020200 is a wasteful number, since it uses less digits than its factorization.

21112020020200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2237 (or 2228 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21112020020200 its reverse (202002021112), we get a palindrome (21314022041312).

The spelling of 21112020020200 in words is "twenty-one trillion, one hundred twelve billion, twenty million, twenty thousand, two hundred".