21232313210 has 8 divisors (see below), whose sum is σ = 38218163796. Its totient is φ = 8492925280.

The previous prime is 21232313119. The next prime is 21232313273. The reversal of 21232313210 is 1231323212.

It can be written as a sum of positive squares in 2 ways, for example, as 21207223129 + 25090081 = 145627^2 + 5009^2 .

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

It is a super-2 number, since 2×21232313210² (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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1061615651 + ... + 1061615670.

Almost surely, 2^21232313210 is an apocalyptic number.

21232313210 is a deficient number, since it is larger than the sum of its proper divisors (16985850586).

21232313210 is a wasteful number, since it uses less digits than its factorization.

21232313210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123231328.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21232313210 its reverse (1231323212), we get a palindrome (22463636422).

The spelling of 21232313210 in words is "twenty-one billion, two hundred thirty-two million, three hundred thirteen thousand, two hundred ten".