2000321021 has 4 divisors (see below), whose sum is σ = 2018672700. Its totient is φ = 1981969344.

The previous prime is 2000321003. The next prime is 2000321033. The reversal of 2000321021 is 1201230002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1599120121 + 401200900 = 39989^2 + 20030^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000321021 - 2²⁶ = 1933212157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2000320993 and 2000321011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000321321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9175676 + ... + 9175893.

It is an arithmetic number, because the mean of its divisors is an integer number (504668175).

Almost surely, 2^2000321021 is an apocalyptic number.

It is an amenable number.

2000321021 is a deficient number, since it is larger than the sum of its proper divisors (18351679).

2000321021 is a wasteful number, since it uses less digits than its factorization.

2000321021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18351678.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2000321021 is about 44724.9485298754. The cubic root of 2000321021 is about 1259.9884564744.

Adding to 2000321021 its reverse (1201230002), we get a palindrome (3201551023).

The spelling of 2000321021 in words is "two billion, three hundred twenty-one thousand, twenty-one".