521300220021252 has 36 divisors (see below), whose sum is σ = 1505978413395456. Its totient is φ = 148942920006000.

The previous prime is 521300220021197. The next prime is 521300220021323. The reversal of 521300220021252 is 252120022003125.

521300220021252 is a `hidden beast` number, since 52 + 130 + 0 + 220 + 0 + 212 + 52 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1034325833124 + ... + 1034325833627.

Almost surely, 2^{521300220021252} is an apocalyptic number.

It is an amenable number.

521300220021252 is an abundant number, since it is smaller than the sum of its proper divisors (984678193374204).

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

521300220021252 is a wasteful number, since it uses less digits than its factorization.

521300220021252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2068651666768 (or 2068651666763 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 521300220021252 its reverse (252120022003125), we get a palindrome (773420242024377).

The spelling of 521300220021252 in words is "five hundred twenty-one trillion, three hundred billion, two hundred twenty million, twenty-one thousand, two hundred fifty-two".