21102503005150 has 48 divisors (see below), whose sum is σ = 44869507167744. Its totient is φ = 7233270490080.

The previous prime is 21102503005117. The next prime is 21102503005189. The reversal of 21102503005150 is 5150030520112.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6451842 + ... + 9155941.

It is an arithmetic number, because the mean of its divisors is an integer number (934781399328).

Almost surely, 2^{21102503005150} is an apocalyptic number.

21102503005150 is an abundant number, since it is smaller than the sum of its proper divisors (23767004162594).

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

21102503005150 is a wasteful number, since it uses less digits than its factorization.

21102503005150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15611665 (or 15611660 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

Adding to 21102503005150 its reverse (5150030520112), we get a palindrome (26252533525262).

The spelling of 21102503005150 in words is "twenty-one trillion, one hundred two billion, five hundred three million, five thousand, one hundred fifty".