21320110312 has 24 divisors (see below), whose sum is σ = 42465016710. Its totient is φ = 10032992000.

The previous prime is 21320110241. The next prime is 21320110313. The reversal of 21320110312 is 21301102312.

It can be written as a sum of positive squares in 3 ways, for example, as 20205485316 + 1114624996 = 142146^2 + 33386^2 .

It is not an unprimeable number, because it can be changed into a prime (21320110313) 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 5 ways as a sum of consecutive naturals, for example, 4608439 + ... + 4613062.

Almost surely, 2^21320110312 is an apocalyptic number.

It is an amenable number.

21320110312 is a deficient number, since it is larger than the sum of its proper divisors (21144906398).

21320110312 is a wasteful number, since it uses less digits than its factorization.

21320110312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9221541 (or 9221520 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21320110312 its reverse (21301102312), we get a palindrome (42621212624).

The spelling of 21320110312 in words is "twenty-one billion, three hundred twenty million, one hundred ten thousand, three hundred twelve".