21002213332200 has 96 divisors (see below), whose sum is σ = 65108366056800. Its totient is φ = 5600460783360.

The previous prime is 21002213332171. The next prime is 21002213332207. The reversal of 21002213332200 is 223331220012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21002213332207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27139839 + ... + 27902961.

It is an arithmetic number, because the mean of its divisors is an integer number (678212146425).

Almost surely, 2^{21002213332200} is an apocalyptic number.

21002213332200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21002213332200 is an abundant number, since it is smaller than the sum of its proper divisors (44106152724600).

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

21002213332200 is a wasteful number, since it uses less digits than its factorization.

21002213332200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809011 (or 809002 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21002213332200 its reverse (223331220012), we get a palindrome (21225544552212).

The spelling of 21002213332200 in words is "twenty-one trillion, two billion, two hundred thirteen million, three hundred thirty-two thousand, two hundred".