21041320012 has 6 divisors (see below), whose sum is σ = 36822310028. Its totient is φ = 10520660004.

The previous prime is 21041320009. The next prime is 21041320021. The reversal of 21041320012 is 21002314012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2630164998 + ... + 2630165005.

Almost surely, 2^21041320012 is an apocalyptic number.

It is an amenable number.

21041320012 is a deficient number, since it is larger than the sum of its proper divisors (15780990016).

21041320012 is a wasteful number, since it uses less digits than its factorization.

21041320012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5260330007 (or 5260330005 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21041320012 its reverse (21002314012), we get a palindrome (42043634024).

The spelling of 21041320012 in words is "twenty-one billion, forty-one million, three hundred twenty thousand, twelve".