21502113252000 has 192 divisors, whose sum is σ = 72344733237504. Its totient is φ = 5578926566400.

The previous prime is 21502113251939. The next prime is 21502113252047. The reversal of 21502113252000 is 25231120512.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23770092 + ... + 24658091.

It is an arithmetic number, because the mean of its divisors is an integer number (376795485612).

Almost surely, 2^{21502113252000} is an apocalyptic number.

21502113252000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21502113252000 is an abundant number, since it is smaller than the sum of its proper divisors (50842619985504).

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

21502113252000 is a wasteful number, since it uses less digits than its factorization.

21502113252000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48428248 (or 48428230 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 21502113252000 its reverse (25231120512), we get a palindrome (21527344372512).

The spelling of 21502113252000 in words is "twenty-one trillion, five hundred two billion, one hundred thirteen million, two hundred fifty-two thousand".