102002321020 has 24 divisors (see below), whose sum is σ = 214284646800. Its totient is φ = 40785733632.

The previous prime is 102002321011. The next prime is 102002321021. The reversal of 102002321020 is 20123200201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102002321021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 894550 + ... + 1002109.

It is an arithmetic number, because the mean of its divisors is an integer number (8928526950).

Almost surely, 2^102002321020 is an apocalyptic number.

102002321020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102002321020 is an abundant number, since it is smaller than the sum of its proper divisors (112282325780).

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

102002321020 is a wasteful number, since it uses less digits than its factorization.

102002321020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1899357 (or 1899355 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 102002321020 its reverse (20123200201), we get a palindrome (122125521221).

The spelling of 102002321020 in words is "one hundred two billion, two million, three hundred twenty-one thousand, twenty".