21331132210 has 8 divisors (see below), whose sum is σ = 38396037996. Its totient is φ = 8532452880.

The previous prime is 21331132201. The next prime is 21331132231. The reversal of 21331132210 is 1223113312.

It can be written as a sum of positive squares in 2 ways, for example, as 21312788121 + 18344089 = 145989^2 + 4283^2 .

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

It is an unprimeable number.

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, 1066556601 + ... + 1066556620.

Almost surely, 2^21331132210 is an apocalyptic number.

21331132210 is a deficient number, since it is larger than the sum of its proper divisors (17064905786).

21331132210 is a wasteful number, since it uses less digits than its factorization.

21331132210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2133113228.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21331132210 its reverse (1223113312), we get a palindrome (22554245522).

The spelling of 21331132210 in words is "twenty-one billion, three hundred thirty-one million, one hundred thirty-two thousand, two hundred ten".