102521532020 has 24 divisors (see below), whose sum is σ = 215485960200. Its totient is φ = 40972280832.

The previous prime is 102521531971. The next prime is 102521532079. The reversal of 102521532020 is 20235125201.

102521532020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7230781156 + 95290750864 = 85034^2 + 308692^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2247605 + ... + 2292764.

It is an arithmetic number, because the mean of its divisors is an integer number (8978581675).

Almost surely, 2^102521532020 is an apocalyptic number.

102521532020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102521532020 is an abundant number, since it is smaller than the sum of its proper divisors (112964428180).

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

102521532020 is a wasteful number, since it uses less digits than its factorization.

102521532020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4541507 (or 4541505 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 102521532020 its reverse (20235125201), we get a palindrome (122756657221).

The spelling of 102521532020 in words is "one hundred two billion, five hundred twenty-one million, five hundred thirty-two thousand, twenty".