2000121128 has 32 divisors (see below), whose sum is σ = 3973746600. Its totient is φ = 940541952.

The previous prime is 2000121121. The next prime is 2000121161. The reversal of 2000121128 is 8211210002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1366189444 + 633931684 = 36962^2 + 25178^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (2000121121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212588 + ... + 221796.

Almost surely, 2^2000121128 is an apocalyptic number.

It is an amenable number.

2000121128 is a deficient number, since it is larger than the sum of its proper divisors (1973625472).

2000121128 is a wasteful number, since it uses less digits than its factorization.

2000121128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10829 (or 10825 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 2000121128 is about 44722.7137817016. The cubic root of 2000121128 is about 1259.9464846676.

The spelling of 2000121128 in words is "two billion, one hundred twenty-one thousand, one hundred twenty-eight".