21210101211200 has 84 divisors (see below), whose sum is σ = 56934660366672. Its totient is φ = 7712764070400.

The previous prime is 21210101211199. The next prime is 21210101211289. The reversal of 21210101211200 is 211210101212.

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, 602542094 + ... + 602577293.

Almost surely, 2^{21210101211200} is an apocalyptic number.

21210101211200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21210101211200 is an abundant number, since it is smaller than the sum of its proper divisors (35724559155472).

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

21210101211200 is a wasteful number, since it uses less digits than its factorization.

21210101211200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205119420 (or 1205119405 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21210101211200 its reverse (211210101212), we get a palindrome (21421311312412).

The spelling of 21210101211200 in words is "twenty-one trillion, two hundred ten billion, one hundred one million, two hundred eleven thousand, two hundred".