102121332520 has 32 divisors (see below), whose sum is σ = 230646683520. Its totient is φ = 40693211200.

The previous prime is 102121332497. The next prime is 102121332589. The reversal of 102121332520 is 25233121201.

It is a junction number, because it is equal to n+sod(n) for n = 102121332491 and 102121332500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4843156 + ... + 4864195.

It is an arithmetic number, because the mean of its divisors is an integer number (7207708860).

Almost surely, 2^102121332520 is an apocalyptic number.

102121332520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102121332520 is an abundant number, since it is smaller than the sum of its proper divisors (128525351000).

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

102121332520 is a wasteful number, since it uses less digits than its factorization.

102121332520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9707625 (or 9707621 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 102121332520 its reverse (25233121201), we get a palindrome (127354453721).

The spelling of 102121332520 in words is "one hundred two billion, one hundred twenty-one million, three hundred thirty-two thousand, five hundred twenty".