21210502153200 has 240 divisors, whose sum is σ = 68465914005216. Its totient is φ = 5612743065600.

The previous prime is 21210502153151. The next prime is 21210502153271. The reversal of 21210502153200 is 235120501212.

It is a tau number, because it is divible by the number of its divisors (240).

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

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, 465722430 + ... + 465767970.

Almost surely, 2^{21210502153200} is an apocalyptic number.

21210502153200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21210502153200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34232957002608).

21210502153200 is an abundant number, since it is smaller than the sum of its proper divisors (47255411852016).

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

21210502153200 is a wasteful number, since it uses less digits than its factorization.

21210502153200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48532 (or 48521 counting only the distinct ones).

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

Adding to 21210502153200 its reverse (235120501212), we get a palindrome (21445622654412).

The spelling of 21210502153200 in words is "twenty-one trillion, two hundred ten billion, five hundred two million, one hundred fifty-three thousand, two hundred".