2121100002 has 24 divisors (see below), whose sum is σ = 5252247936. Its totient is φ = 606028536.

The previous prime is 2121099983. The next prime is 2121100019. The reversal of 2121100002 is 2000011212.

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

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 11 ways as a sum of consecutive naturals, for example, 8416938 + ... + 8417189.

It is an arithmetic number, because the mean of its divisors is an integer number (218843664).

Almost surely, 2^2121100002 is an apocalyptic number.

2121100002 is an abundant number, since it is smaller than the sum of its proper divisors (3131147934).

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

2121100002 is a wasteful number, since it uses less digits than its factorization.

2121100002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16834142 (or 16834139 counting only the distinct ones).

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

The square root of 2121100002 is about 46055.4014421761. The cubic root of 2121100002 is about 1284.8538044199.

Adding to 2121100002 its reverse (2000011212), we get a palindrome (4121111214).

The spelling of 2121100002 in words is "two billion, one hundred twenty-one million, one hundred thousand, two".