21200022010 has 8 divisors (see below), whose sum is σ = 38160039636. Its totient is φ = 8480008800.

The previous prime is 21200022007. The next prime is 21200022017. The reversal of 21200022010 is 1022000212.

It can be written as a sum of positive squares in 2 ways, for example, as 18103433401 + 3096588609 = 134549^2 + 55647^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (10), and also a Moran number because the ratio is a prime number: 2120002201 = 21200022010 / (2 + 1 + 2 + 0 + 0 + 0 + 2 + 2 + 0 + 1 + 0).

It is not an unprimeable number, because it can be changed into a prime (21200022017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1060001091 + ... + 1060001110.

Almost surely, 2^21200022010 is an apocalyptic number.

21200022010 is a deficient number, since it is larger than the sum of its proper divisors (16960017626).

21200022010 is a wasteful number, since it uses less digits than its factorization.

21200022010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120002208.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 21200022010 its reverse (1022000212), we get a palindrome (22222022222).

The spelling of 21200022010 in words is "twenty-one billion, two hundred million, twenty-two thousand, ten".