21120424515325 has 48 divisors (see below), whose sum is σ = 26351221628160. Its totient is φ = 16792292724480.

The previous prime is 21120424515293. The next prime is 21120424515371. The reversal of 21120424515325 is 52351542402112.

It is not a de Polignac number, because 21120424515325 - 2⁵ = 21120424515293 is a prime.

It is a super-2 number, since 2×21120424515325² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5524566364 + ... + 5524570186.

It is an arithmetic number, because the mean of its divisors is an integer number (548983783920).

Almost surely, 2^{21120424515325} is an apocalyptic number.

21120424515325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21120424515325 is a deficient number, since it is larger than the sum of its proper divisors (5230797112835).

21120424515325 is a wasteful number, since it uses less digits than its factorization.

21120424515325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6118 (or 6113 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 37.

Adding to 21120424515325 its reverse (52351542402112), we get a palindrome (73471966917437).

The spelling of 21120424515325 in words is "twenty-one trillion, one hundred twenty billion, four hundred twenty-four million, five hundred fifteen thousand, three hundred twenty-five".