210021000252 has 24 divisors (see below), whose sum is σ = 560056000896. Its totient is φ = 60006000048.

The previous prime is 210021000239. The next prime is 210021000257. The reversal of 210021000252 is 252000120012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021000257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1250124918 + ... + 1250125085.

It is an arithmetic number, because the mean of its divisors is an integer number (23335666704).

Almost surely, 2^210021000252 is an apocalyptic number.

It is an amenable number.

210021000252 is an abundant number, since it is smaller than the sum of its proper divisors (350035000644).

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

210021000252 is a wasteful number, since it uses less digits than its factorization.

210021000252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500250017 (or 2500250015 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

Adding to 210021000252 its reverse (252000120012), we get a palindrome (462021120264).

The spelling of 210021000252 in words is "two hundred ten billion, twenty-one million, two hundred fifty-two", and thus it is an aban number.