3040123021 has 4 divisors (see below), whose sum is σ = 3273978652. Its totient is φ = 2806267392.

The previous prime is 3040123013. The next prime is 3040123061. The reversal of 3040123021 is 1203210403.

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 313821225 + 2726301796 = 17715^2 + 52214^2 .

It is a cyclic number.

It is not a de Polignac number, because 3040123021 - 2³ = 3040123013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3040122986 and 3040123004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3040123001) 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, 116927796 + ... + 116927821.

It is an arithmetic number, because the mean of its divisors is an integer number (818494663).

Almost surely, 2^3040123021 is an apocalyptic number.

It is an amenable number.

3040123021 is a deficient number, since it is larger than the sum of its proper divisors (233855631).

3040123021 is a wasteful number, since it uses less digits than its factorization.

3040123021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233855630.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 3040123021 is about 55137.3106072467. The cubic root of 3040123021 is about 1448.6508292219.

Adding to 3040123021 its reverse (1203210403), we get a palindrome (4243333424).

The spelling of 3040123021 in words is "three billion, forty million, one hundred twenty-three thousand, twenty-one".