21120515015532 has 48 divisors (see below), whose sum is σ = 50024049344640. Its totient is φ = 6934081283712.

The previous prime is 21120515015449. The next prime is 21120515015591. The reversal of 21120515015532 is 23551051502112.

21120515015532 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 21120515015493 and 21120515015502.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3597519 + ... + 7428537.

It is an arithmetic number, because the mean of its divisors is an integer number (1042167694680).

Almost surely, 2^{21120515015532} is an apocalyptic number.

It is an amenable number.

21120515015532 is an abundant number, since it is smaller than the sum of its proper divisors (28903534329108).

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

21120515015532 is a wasteful number, since it uses less digits than its factorization.

21120515015532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3837950 (or 3837948 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 33.

Adding to 21120515015532 its reverse (23551051502112), we get a palindrome (44671566517644).

The spelling of 21120515015532 in words is "twenty-one trillion, one hundred twenty billion, five hundred fifteen million, fifteen thousand, five hundred thirty-two".