21113320012 has 6 divisors (see below), whose sum is σ = 36948310028. Its totient is φ = 10556660004.

The previous prime is 21113320001. The next prime is 21113320091. The reversal of 21113320012 is 21002331112.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2639164998 + ... + 2639165005.

Almost surely, 2^21113320012 is an apocalyptic number.

It is an amenable number.

21113320012 is a deficient number, since it is larger than the sum of its proper divisors (15834990016).

21113320012 is a wasteful number, since it uses less digits than its factorization.

21113320012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5278330007 (or 5278330005 counting only the distinct ones).

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

Adding to 21113320012 its reverse (21002331112), we get a palindrome (42115651124).

The spelling of 21113320012 in words is "twenty-one billion, one hundred thirteen million, three hundred twenty thousand, twelve".