521020122553252 has 24 divisors (see below), whose sum is σ = 1042044229197440. Its totient is φ = 223293484503360.

The previous prime is 521020122553201. The next prime is 521020122553253. The reversal of 521020122553252 is 252355221020125.

It is not an unprimeable number, because it can be changed into a prime (521020122553253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28090449 + ... + 42791512.

Almost surely, 2^{521020122553252} is an apocalyptic number.

It is an amenable number.

521020122553252 is an abundant number, since it is smaller than the sum of its proper divisors (521024106644188).

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

521020122553252 is a wasteful number, since it uses less digits than its factorization.

521020122553252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71144491 (or 71144489 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 37.

Adding to 521020122553252 its reverse (252355221020125), we get a palindrome (773375343573377).

The spelling of 521020122553252 in words is "five hundred twenty-one trillion, twenty billion, one hundred twenty-two million, five hundred fifty-three thousand, two hundred fifty-two".