21120424515326 has 8 divisors (see below), whose sum is σ = 32536870199400. Its totient is φ = 10274801115528.

The previous prime is 21120424515293. The next prime is 21120424515371. The reversal of 21120424515326 is 62351542402112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21120424515326.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142705570976 + ... + 142705571123.

It is an arithmetic number, because the mean of its divisors is an integer number (4067108774925).

Almost surely, 2^{21120424515326} is an apocalyptic number.

21120424515326 is a deficient number, since it is larger than the sum of its proper divisors (11416445684074).

21120424515326 is a wasteful number, since it uses less digits than its factorization.

21120424515326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285411142138.

The product of its (nonzero) digits is 115200, while the sum is 38.

Adding to 21120424515326 its reverse (62351542402112), we get a palindrome (83471966917438).

The spelling of 21120424515326 in words is "twenty-one trillion, one hundred twenty billion, four hundred twenty-four million, five hundred fifteen thousand, three hundred twenty-six".