21313321210 has 8 divisors (see below), whose sum is σ = 38363978196. Its totient is φ = 8525328480.

The previous prime is 21313321181. The next prime is 21313321259. The reversal of 21313321210 is 1212331312.

It can be written as a sum of positive squares in 2 ways, for example, as 20410979689 + 902341521 = 142867^2 + 30039^2 .

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

It is a super-2 number, since 2×21313321210² (a number of 21 digits) contains 22 as substring.

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, 1065666051 + ... + 1065666070.

Almost surely, 2^21313321210 is an apocalyptic number.

21313321210 is a deficient number, since it is larger than the sum of its proper divisors (17050656986).

21313321210 is a wasteful number, since it uses less digits than its factorization.

21313321210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131332128.

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

Adding to 21313321210 its reverse (1212331312), we get a palindrome (22525652522).

The spelling of 21313321210 in words is "twenty-one billion, three hundred thirteen million, three hundred twenty-one thousand, two hundred ten".