21251103054024 has 16 divisors (see below), whose sum is σ = 53127757635120. Its totient is φ = 7083701018000.

The previous prime is 21251103053989. The next prime is 21251103054047. The reversal of 21251103054024 is 42045030115212.

It is a junction number, because it is equal to n+sod(n) for n = 21251103053982 and 21251103054000.

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, 442731313602 + ... + 442731313649.

It is an arithmetic number, because the mean of its divisors is an integer number (3320484852195).

Almost surely, 2^{21251103054024} is an apocalyptic number.

21251103054024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21251103054024 is an abundant number, since it is smaller than the sum of its proper divisors (31876654581096).

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

21251103054024 is a wasteful number, since it uses less digits than its factorization.

21251103054024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885462627260 (or 885462627256 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 21251103054024 its reverse (42045030115212), we get a palindrome (63296133169236).

The spelling of 21251103054024 in words is "twenty-one trillion, two hundred fifty-one billion, one hundred three million, fifty-four thousand, twenty-four".