121002100002 has 96 divisors (see below), whose sum is σ = 306149455872. Its totient is φ = 33819845472.

The previous prime is 121002099997. The next prime is 121002100069. The reversal of 121002100002 is 200001200121.

121002100002 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16832653 + ... + 16839839.

It is an arithmetic number, because the mean of its divisors is an integer number (3189056832).

Almost surely, 2^121002100002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121002100002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153074727936).

121002100002 is an abundant number, since it is smaller than the sum of its proper divisors (185147355870).

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

121002100002 is a wasteful number, since it uses less digits than its factorization.

121002100002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10092 (or 10089 counting only the distinct ones).

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

Adding to 121002100002 its reverse (200001200121), we get a palindrome (321003300123).

The spelling of 121002100002 in words is "one hundred twenty-one billion, two million, one hundred thousand, two".