21120424515324 has 24 divisors (see below), whose sum is σ = 54756656151120. Its totient is φ = 7040141505072.

The previous prime is 21120424515293. The next prime is 21120424515371. The reversal of 21120424515324 is 42351542402112.

21120424515324 is a `hidden beast` number, since 2 + 11 + 20 + 42 + 4 + 51 + 532 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 97779743019 + ... + 97779743234.

It is an arithmetic number, because the mean of its divisors is an integer number (2281527339630).

Almost surely, 2^{21120424515324} is an apocalyptic number.

It is an amenable number.

21120424515324 is an abundant number, since it is smaller than the sum of its proper divisors (33636231635796).

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

21120424515324 is a wasteful number, since it uses less digits than its factorization.

21120424515324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195559486266 (or 195559486258 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

Adding to 21120424515324 its reverse (42351542402112), we get a palindrome (63471966917436).

The spelling of 21120424515324 in words is "twenty-one trillion, one hundred twenty billion, four hundred twenty-four million, five hundred fifteen thousand, three hundred twenty-four".