21152213032016 has 40 divisors (see below), whose sum is σ = 44717285746848. Its totient is φ = 9612663984000.

The previous prime is 21152213032009. The next prime is 21152213032037. The reversal of 21152213032016 is 61023031225112.

It is a super-2 number, since 2×21152213032016² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21152213032016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11506430 + ... + 13217501.

Almost surely, 2^{21152213032016} is an apocalyptic number.

It is an amenable number.

21152213032016 is an abundant number, since it is smaller than the sum of its proper divisors (23565072714832).

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

21152213032016 is a wasteful number, since it uses less digits than its factorization.

21152213032016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24728811 (or 24728805 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 21152213032016 its reverse (61023031225112), we get a palindrome (82175244257128).

The spelling of 21152213032016 in words is "twenty-one trillion, one hundred fifty-two billion, two hundred thirteen million, thirty-two thousand, sixteen".