21010100211200 has 120 divisors (see below), whose sum is σ = 52149345072792. Its totient is φ = 8388673413120.

The previous prime is 21010100211173. The next prime is 21010100211229. The reversal of 21010100211200 is 211200101012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5501222 + ... + 8501978.

Almost surely, 2^{21010100211200} is an apocalyptic number.

21010100211200 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 21010100211200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26074672536396).

21010100211200 is an abundant number, since it is smaller than the sum of its proper divisors (31139244861592).

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

21010100211200 is an equidigital number, since it uses as much as digits as its factorization.

21010100211200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3001332 (or 3001311 counting only the distinct ones).

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

Adding to 21010100211200 its reverse (211200101012), we get a palindrome (21221300312212).

The spelling of 21010100211200 in words is "twenty-one trillion, ten billion, one hundred million, two hundred eleven thousand, two hundred".