21011001200200 has 48 divisors (see below), whose sum is σ = 53291539413360. Its totient is φ = 7640364072000.

The previous prime is 21011001200197. The next prime is 21011001200201. The reversal of 21011001200200 is 200210011012.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (21011001200201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4775225346 + ... + 4775229745.

It is an arithmetic number, because the mean of its divisors is an integer number (1110240404445).

Almost surely, 2^{21011001200200} is an apocalyptic number.

21011001200200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21011001200200 is an abundant number, since it is smaller than the sum of its proper divisors (32280538213160).

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

21011001200200 is a wasteful number, since it uses less digits than its factorization.

21011001200200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9550455118 (or 9550455109 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21011001200200 its reverse (200210011012), we get a palindrome (21211211211212).

The spelling of 21011001200200 in words is "twenty-one trillion, eleven billion, one million, two hundred thousand, two hundred".