2121000002 has 32 divisors (see below), whose sum is σ = 3685357440. Its totient is φ = 904794880.

The previous prime is 2120999989. The next prime is 2121000023. The reversal of 2121000002 is 2000001212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126368 + ... + 142164.

It is an arithmetic number, because the mean of its divisors is an integer number (115167420).

Almost surely, 2^2121000002 is an apocalyptic number.

2121000002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2121000002 is a deficient number, since it is larger than the sum of its proper divisors (1564357438).

2121000002 is a wasteful number, since it uses less digits than its factorization.

2121000002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16186.

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

The square root of 2121000002 is about 46054.3157803913. The cubic root of 2121000002 is about 1284.8336124755.

Adding to 2121000002 its reverse (2000001212), we get a palindrome (4121001214).

The spelling of 2121000002 in words is "two billion, one hundred twenty-one million, two", and thus it is an aban number.