21200000210010 has 24 divisors (see below), whose sum is σ = 55120000546260. Its totient is φ = 5653333389312.

The previous prime is 21200000209837. The next prime is 21200000210017. The reversal of 21200000210010 is 1001200000212.

It can be written as a sum of positive squares in 2 ways, for example, as 21023426287161 + 176573922849 = 4585131^2 + 420207^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 21200000209974 and 21200000210001.

It is not an unprimeable number, because it can be changed into a prime (21200000210017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117777778855 + ... + 117777779034.

Almost surely, 2^{21200000210010} is an apocalyptic number.

21200000210010 is an abundant number, since it is smaller than the sum of its proper divisors (33920000336250).

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

21200000210010 is a wasteful number, since it uses less digits than its factorization.

21200000210010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235555557902 (or 235555557899 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 21200000210010 its reverse (1001200000212), we get a palindrome (22201200210222).

The spelling of 21200000210010 in words is "twenty-one trillion, two hundred billion, two hundred ten thousand, ten".