21012200652 has 48 divisors (see below), whose sum is σ = 49868985600. Its totient is φ = 6884843328.

The previous prime is 21012200633. The next prime is 21012200663. The reversal of 21012200652 is 25600221012.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145198 + ... + 251210.

It is an arithmetic number, because the mean of its divisors is an integer number (1038937200).

Almost surely, 2^21012200652 is an apocalyptic number.

It is an amenable number.

21012200652 is an abundant number, since it is smaller than the sum of its proper divisors (28856784948).

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

21012200652 is a wasteful number, since it uses less digits than its factorization.

21012200652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106302 (or 106300 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 21012200652 its reverse (25600221012), we get a palindrome (46612421664).

The spelling of 21012200652 in words is "twenty-one billion, twelve million, two hundred thousand, six hundred fifty-two".