4012304021 has 4 divisors (see below), whose sum is σ = 4377058944. Its totient is φ = 3647549100.

The previous prime is 4012304017. The next prime is 4012304033. The reversal of 4012304021 is 1204032104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4012304021 - 2² = 4012304017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4012304041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182377445 + ... + 182377466.

It is an arithmetic number, because the mean of its divisors is an integer number (1094264736).

Almost surely, 2^4012304021 is an apocalyptic number.

It is an amenable number.

4012304021 is a deficient number, since it is larger than the sum of its proper divisors (364754923).

4012304021 is a wasteful number, since it uses less digits than its factorization.

4012304021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364754922.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 4012304021 is about 63342.7503428767. The cubic root of 4012304021 is about 1589.0270039503.

Adding to 4012304021 its reverse (1204032104), we get a palindrome (5216336125).

The spelling of 4012304021 in words is "four billion, twelve million, three hundred four thousand, twenty-one".