21120002210 has 16 divisors (see below), whose sum is σ = 38315344896. Its totient is φ = 8381480688.

The previous prime is 21120002191. The next prime is 21120002213. The reversal of 21120002210 is 1220002112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21120002191 and 21120002200.

It is not an unprimeable number, because it can be changed into a prime (21120002213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8313692 + ... + 8316231.

It is an arithmetic number, because the mean of its divisors is an integer number (2394709056).

Almost surely, 2^21120002210 is an apocalyptic number.

21120002210 is a deficient number, since it is larger than the sum of its proper divisors (17195342686).

21120002210 is a wasteful number, since it uses less digits than its factorization.

21120002210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16630057.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21120002210 its reverse (1220002112), we get a palindrome (22340004322).

The spelling of 21120002210 in words is "twenty-one billion, one hundred twenty million, two thousand, two hundred ten".