3012001021 has 8 divisors (see below), whose sum is σ = 3094160184. Its totient is φ = 2929881600.

The previous prime is 3012001001. The next prime is 3012001073. The reversal of 3012001021 is 1201002103.

It can be written as a sum of positive squares in 4 ways, for example, as 1335098521 + 1676902500 = 36539^2 + 40950^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3012001021 - 2⁵ = 3012000989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3012000989 and 3012001007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3012001001) 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, 207621 + ... + 221653.

It is an arithmetic number, because the mean of its divisors is an integer number (386770023).

Almost surely, 2^3012001021 is an apocalyptic number.

It is an amenable number.

3012001021 is a deficient number, since it is larger than the sum of its proper divisors (82159163).

3012001021 is a wasteful number, since it uses less digits than its factorization.

3012001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19871.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 3012001021 is about 54881.7002378753. The cubic root of 3012001021 is about 1444.1701745982.

Adding to 3012001021 its reverse (1201002103), we get a palindrome (4213003124).

The spelling of 3012001021 in words is "three billion, twelve million, one thousand, twenty-one".