3002000021 has 4 divisors (see below), whose sum is σ = 3007203372. Its totient is φ = 2996796672.

The previous prime is 3002000017. The next prime is 3002000093. The reversal of 3002000021 is 1200002003.

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 2617447921 + 384552100 = 51161^2 + 19610^2 .

It is a cyclic number.

It is not a de Polignac number, because 3002000021 - 2² = 3002000017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3001999972 and 3002000008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3002008021) 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, 2600810 + ... + 2601963.

It is an arithmetic number, because the mean of its divisors is an integer number (751800843).

Almost surely, 2^3002000021 is an apocalyptic number.

It is an amenable number.

3002000021 is a deficient number, since it is larger than the sum of its proper divisors (5203351).

3002000021 is an equidigital number, since it uses as much as digits as its factorization.

3002000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5203350.

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 3002000021 is about 54790.5103188499. The cubic root of 3002000021 is about 1442.5700023798.

Adding to 3002000021 its reverse (1200002003), we get a palindrome (4202002024).

The spelling of 3002000021 in words is "three billion, two million, twenty-one", and thus it is an aban number and an uban number.