21000220201200 has 60 divisors (see below), whose sum is σ = 67270705381688. Its totient is φ = 5600058720000.

The previous prime is 21000220201199. The next prime is 21000220201211. The reversal of 21000220201200 is 210202200012.

It is a tau number, because it is divible by the number of its divisors (60).

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 polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8750090551 + ... + 8750092950.

Almost surely, 2^{21000220201200} is an apocalyptic number.

21000220201200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21000220201200 is an abundant number, since it is smaller than the sum of its proper divisors (46270485180488).

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

21000220201200 is a wasteful number, since it uses less digits than its factorization.

21000220201200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17500183522 (or 17500183511 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21000220201200 its reverse (210202200012), we get a palindrome (21210422401212).

The spelling of 21000220201200 in words is "twenty-one trillion, two hundred twenty million, two hundred one thousand, two hundred".