21215210048 has 28 divisors (see below), whose sum is σ = 42104748912. Its totient is φ = 10606139520.

The previous prime is 21215210047. The next prime is 21215210117. The reversal of 21215210048 is 84001251212.

It is a junction number, because it is equal to n+sod(n) for n = 21215209999 and 21215210026.

It is not an unprimeable number, because it can be changed into a prime (21215210041) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 558311 + ... + 595097.

Almost surely, 2^21215210048 is an apocalyptic number.

It is an amenable number.

21215210048 is a deficient number, since it is larger than the sum of its proper divisors (20889538864).

21215210048 is an equidigital number, since it uses as much as digits as its factorization.

21215210048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45810 (or 45800 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The spelling of 21215210048 in words is "twenty-one billion, two hundred fifteen million, two hundred ten thousand, forty-eight".