21201200052 has 24 divisors (see below), whose sum is σ = 50619920736. Its totient is φ = 6902716128.

The previous prime is 21201200047. The next prime is 21201200093. The reversal of 21201200052 is 25000210212.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 20543283 + ... + 20544314.

It is an arithmetic number, because the mean of its divisors is an integer number (2109163364).

Almost surely, 2^21201200052 is an apocalyptic number.

It is an amenable number.

21201200052 is an abundant number, since it is smaller than the sum of its proper divisors (29418720684).

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

21201200052 is a wasteful number, since it uses less digits than its factorization.

21201200052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41087647 (or 41087645 counting only the distinct ones).

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

Adding to 21201200052 its reverse (25000210212), we get a palindrome (46201410264).

The spelling of 21201200052 in words is "twenty-one billion, two hundred one million, two hundred thousand, fifty-two".