3031030021 has 4 divisors (see below), whose sum is σ = 3033258444. Its totient is φ = 3028801600.

The previous prime is 3031030019. The next prime is 3031030063. The reversal of 3031030021 is 1200301303.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1200301303 = 17 ⋅70605959.

It can be written as a sum of positive squares in 2 ways, for example, as 185340996 + 2845689025 = 13614^2 + 53345^2 .

It is a cyclic number.

It is not a de Polignac number, because 3031030021 - 2¹ = 3031030019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3031029983 and 3031030010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3031033021) 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, 1112170 + ... + 1114891.

It is an arithmetic number, because the mean of its divisors is an integer number (758314611).

Almost surely, 2^3031030021 is an apocalyptic number.

It is an amenable number.

3031030021 is a deficient number, since it is larger than the sum of its proper divisors (2228423).

3031030021 is a wasteful number, since it uses less digits than its factorization.

3031030021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2228422.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 3031030021 is about 55054.7910812492. The cubic root of 3031030021 is about 1447.2050832419.

Adding to 3031030021 its reverse (1200301303), we get a palindrome (4231331324).

The spelling of 3031030021 in words is "three billion, thirty-one million, thirty thousand, twenty-one".