21150711216 has 60 divisors (see below), whose sum is σ = 59206190472. Its totient is φ = 7048620288.

The previous prime is 21150711203. The next prime is 21150711221. The reversal of 21150711216 is 61211705112.

It is a self number, because there is not a number n which added to its sum of digits gives 21150711216.

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 11 ways as a sum of consecutive naturals, for example, 726900 + ... + 755436.

Almost surely, 2^21150711216 is an apocalyptic number.

It is an amenable number.

21150711216 is an abundant number, since it is smaller than the sum of its proper divisors (38055479256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21150711216 is a wasteful number, since it uses less digits than its factorization.

21150711216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33698 (or 33689 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 27.

The spelling of 21150711216 in words is "twenty-one billion, one hundred fifty million, seven hundred eleven thousand, two hundred sixteen".