21168130912 has 12 divisors (see below), whose sum is σ = 41674757796. Its totient is φ = 10584065440.

The previous prime is 21168130909. The next prime is 21168130931. The reversal of 21168130912 is 21903186112.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330752014 + ... + 330752077.

It is an arithmetic number, because the mean of its divisors is an integer number (3472896483).

Almost surely, 2^21168130912 is an apocalyptic number.

It is an amenable number.

21168130912 is a deficient number, since it is larger than the sum of its proper divisors (20506626884).

21168130912 is an equidigital number, since it uses as much as digits as its factorization.

21168130912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661504101 (or 661504093 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 34.

The spelling of 21168130912 in words is "twenty-one billion, one hundred sixty-eight million, one hundred thirty thousand, nine hundred twelve".