21312104330344 has 32 divisors (see below), whose sum is σ = 40470360480000. Its totient is φ = 10520037133632.

The previous prime is 21312104330339. The next prime is 21312104330371. The reversal of 21312104330344 is 44303340121312.

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 7 ways as a sum of consecutive naturals, for example, 4105077 + ... + 7712059.

It is an arithmetic number, because the mean of its divisors is an integer number (1264698765000).

Almost surely, 2^{21312104330344} is an apocalyptic number.

It is an amenable number.

21312104330344 is a deficient number, since it is larger than the sum of its proper divisors (19158256149656).

21312104330344 is a wasteful number, since it uses less digits than its factorization.

21312104330344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3616417 (or 3616413 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 21312104330344 its reverse (44303340121312), we get a palindrome (65615444451656).

The spelling of 21312104330344 in words is "twenty-one trillion, three hundred twelve billion, one hundred four million, three hundred thirty thousand, three hundred forty-four".