2120002020 has 36 divisors (see below), whose sum is σ = 6430673340. Its totient is φ = 565333824.

The previous prime is 2120002013. The next prime is 2120002043. The reversal of 2120002020 is 202000212.

It can be written as a sum of positive squares in 2 ways, for example, as 228795876 + 1891206144 = 15126^2 + 43488^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 2120001993 and 2120002011.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5888715 + ... + 5889074.

It is an arithmetic number, because the mean of its divisors is an integer number (178629815).

Almost surely, 2^2120002020 is an apocalyptic number.

2120002020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120002020 is an abundant number, since it is smaller than the sum of its proper divisors (4310671320).

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

2120002020 is a wasteful number, since it uses less digits than its factorization.

2120002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11777804 (or 11777799 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 2120002020 is about 46043.4796686784. The cubic root of 2120002020 is about 1284.6320657243.

Adding to 2120002020 its reverse (202000212), we get a palindrome (2322002232).

The spelling of 2120002020 in words is "two billion, one hundred twenty million, two thousand, twenty".