21012413052 has 12 divisors (see below), whose sum is σ = 49028963816. Its totient is φ = 7004137680.

The previous prime is 21012413047. The next prime is 21012413053. The reversal of 21012413052 is 25031421012.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012413053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875517199 + ... + 875517222.

Almost surely, 2^21012413052 is an apocalyptic number.

It is an amenable number.

21012413052 is an abundant number, since it is smaller than the sum of its proper divisors (28016550764).

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

21012413052 is a wasteful number, since it uses less digits than its factorization.

21012413052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1751034428 (or 1751034426 counting only the distinct ones).

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

Adding to 21012413052 its reverse (25031421012), we get a palindrome (46043834064).

The spelling of 21012413052 in words is "twenty-one billion, twelve million, four hundred thirteen thousand, fifty-two".