21111001210200 has 768 divisors, whose sum is σ = 76753966003200. Its totient is φ = 4743025459200.

The previous prime is 21111001210153. The next prime is 21111001210241. The reversal of 21111001210200 is 201210011112.

It is a super-3 number, since 3×21111001210200³ (a number of 41 digits) contains 333 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 pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 6085614066 + ... + 6085617534.

It is an arithmetic number, because the mean of its divisors is an integer number (99940059900).

Almost surely, 2^{21111001210200} is an apocalyptic number.

21111001210200 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 21111001210200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38376983001600).

21111001210200 is an abundant number, since it is smaller than the sum of its proper divisors (55642964793000).

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

21111001210200 is a wasteful number, since it uses less digits than its factorization.

21111001210200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4332 (or 4323 counting only the distinct ones).

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

Adding to 21111001210200 its reverse (201210011112), we get a palindrome (21312211221312).

The spelling of 21111001210200 in words is "twenty-one trillion, one hundred eleven billion, one million, two hundred ten thousand, two hundred".