120002100102 has 128 divisors (see below), whose sum is σ = 276378009600. Its totient is φ = 38571821568.

The previous prime is 120002100061. The next prime is 120002100109. The reversal of 120002100102 is 201001200021.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120002100109) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 67529838 + ... + 67531614.

It is an arithmetic number, because the mean of its divisors is an integer number (2159203200).

Almost surely, 2^120002100102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 120002100102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138189004800).

120002100102 is an abundant number, since it is smaller than the sum of its proper divisors (156375909498).

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

120002100102 is a wasteful number, since it uses less digits than its factorization.

120002100102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2187 (or 2181 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 120002100102 its reverse (201001200021), we get a palindrome (321003300123).

The spelling of 120002100102 in words is "one hundred twenty billion, two million, one hundred thousand, one hundred two".