102100020020 has 48 divisors (see below), whose sum is σ = 217972798848. Its totient is φ = 40161682560.

The previous prime is 102100020017. The next prime is 102100020047. The reversal of 102100020020 is 20020001201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10197857 + ... + 10207863.

It is an arithmetic number, because the mean of its divisors is an integer number (4541099976).

Almost surely, 2^102100020020 is an apocalyptic number.

102100020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102100020020 is an abundant number, since it is smaller than the sum of its proper divisors (115872778828).

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

102100020020 is a wasteful number, since it uses less digits than its factorization.

102100020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18440 (or 18438 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 102100020020 its reverse (20020001201), we get a palindrome (122120021221).

The spelling of 102100020020 in words is "one hundred two billion, one hundred million, twenty thousand, twenty".