21101647612 has 48 divisors (see below), whose sum is σ = 38054772000. Its totient is φ = 10232176640.

The previous prime is 21101647607. The next prime is 21101647631. The reversal of 21101647612 is 21674610112.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 37480443 + ... + 37481005.

It is an arithmetic number, because the mean of its divisors is an integer number (792807750).

Almost surely, 2^21101647612 is an apocalyptic number.

It is an amenable number.

21101647612 is a deficient number, since it is larger than the sum of its proper divisors (16953124388).

21101647612 is a wasteful number, since it uses less digits than its factorization.

21101647612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566 (or 1564 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The spelling of 21101647612 in words is "twenty-one billion, one hundred one million, six hundred forty-seven thousand, six hundred twelve".