21312301312 has 36 divisors (see below), whose sum is σ = 42552817776. Its totient is φ = 10653278720.

The previous prime is 21312301303. The next prime is 21312301327. The reversal of 21312301312 is 21310321312.

It is a self number, because there is not a number n which added to its sum of digits gives 21312301312.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1192023 + ... + 1209769.

It is an arithmetic number, because the mean of its divisors is an integer number (1182022716).

Almost surely, 2^21312301312 is an apocalyptic number.

It is an amenable number.

21312301312 is a deficient number, since it is larger than the sum of its proper divisors (21240516464).

21312301312 is an equidigital number, since it uses as much as digits as its factorization.

21312301312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22454 (or 22440 counting only the distinct ones).

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

Adding to 21312301312 its reverse (21310321312), we get a palindrome (42622622624).

It can be divided in two parts, 21312 and 301312, that added together give a square (322624 = 568²).

The spelling of 21312301312 in words is "twenty-one billion, three hundred twelve million, three hundred one thousand, three hundred twelve".