2120021002 has 16 divisors (see below), whose sum is σ = 3549804192. Its totient is φ = 941235120.

The previous prime is 2120020997. The next prime is 2120021003. The reversal of 2120021002 is 2001200212.

It is a self number, because there is not a number n which added to its sum of digits gives 2120021002.

It is not an unprimeable number, because it can be changed into a prime (2120021003) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1119573 + ... + 1121464.

It is an arithmetic number, because the mean of its divisors is an integer number (221862762).

Almost surely, 2^2120021002 is an apocalyptic number.

2120021002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2120021002 is a deficient number, since it is larger than the sum of its proper divisors (1429783190).

2120021002 is a wasteful number, since it uses less digits than its factorization.

2120021002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2241093.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 2120021002 is about 46043.6857994666. The cubic root of 2120021002 is about 1284.6358998107.

Adding to 2120021002 its reverse (2001200212), we get a palindrome (4121221214).

The spelling of 2120021002 in words is "two billion, one hundred twenty million, twenty-one thousand, two".