200002002120 has 80 divisors (see below), whose sum is σ = 672228962460. Its totient is φ = 53333866368.

The previous prime is 200002002113. The next prime is 200002002131. The reversal of 200002002120 is 21200200002.

It can be written as a sum of positive squares in 2 ways, for example, as 199417619844 + 584382276 = 446562^2 + 24174^2 .

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 19 ways as a sum of consecutive naturals, for example, 30861267 + ... + 30867746.

Almost surely, 2^200002002120 is an apocalyptic number.

200002002120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200002002120 is an abundant number, since it is smaller than the sum of its proper divisors (472226960340).

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

200002002120 is a wasteful number, since it uses less digits than its factorization.

200002002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61729036 (or 61729023 counting only the distinct ones).

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

Adding to 200002002120 its reverse (21200200002), we get a palindrome (221202202122).

The spelling of 200002002120 in words is "two hundred billion, two million, two thousand, one hundred twenty".