21223032210 has 64 divisors (see below), whose sum is σ = 57662616960. Its totient is φ = 5552688960.

The previous prime is 21223032209. The next prime is 21223032217. The reversal of 21223032210 is 1223032212.

21223032210 is a `hidden beast` number, since 212 + 230 + 3 + 221 + 0 = 666.

21223032210 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21223032217) 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 31 ways as a sum of consecutive naturals, for example, 727236 + ... + 755855.

It is an arithmetic number, because the mean of its divisors is an integer number (900978390).

Almost surely, 2^21223032210 is an apocalyptic number.

21223032210 is an abundant number, since it is smaller than the sum of its proper divisors (36439584750).

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

21223032210 is a wasteful number, since it uses less digits than its factorization.

21223032210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1483160 (or 1483154 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21223032210 its reverse (1223032212), we get a palindrome (22446064422).

The spelling of 21223032210 in words is "twenty-one billion, two hundred twenty-three million, thirty-two thousand, two hundred ten".