21010220212200 has 192 divisors, whose sum is σ = 72592588152000. Its totient is φ = 4995618877440.

The previous prime is 21010220212171. The next prime is 21010220212207. The reversal of 21010220212200 is 221202201012.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21010220212200.

It is not an unprimeable number, because it can be changed into a prime (21010220212207) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 54012135 + ... + 54399734.

It is an arithmetic number, because the mean of its divisors is an integer number (378086396625).

Almost surely, 2^{21010220212200} is an apocalyptic number.

21010220212200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010220212200 is an abundant number, since it is smaller than the sum of its proper divisors (51582367939800).

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

21010220212200 is a wasteful number, since it uses less digits than its factorization.

21010220212200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108411924 (or 108411915 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21010220212200 its reverse (221202201012), we get a palindrome (21231422413212).

The spelling of 21010220212200 in words is "twenty-one trillion, ten billion, two hundred twenty million, two hundred twelve thousand, two hundred".