4048021021 has 4 divisors (see below), whose sum is σ = 4416022944. Its totient is φ = 3680019100.

The previous prime is 4048020983. The next prime is 4048021027. The reversal of 4048021021 is 1201208404.

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 4048021021 - 2¹⁷ = 4047889949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4048020983 and 4048021001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4048021027) 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, 184000945 + ... + 184000966.

It is an arithmetic number, because the mean of its divisors is an integer number (1104005736).

Almost surely, 2^4048021021 is an apocalyptic number.

It is an amenable number.

4048021021 is a deficient number, since it is larger than the sum of its proper divisors (368001923).

4048021021 is a wasteful number, since it uses less digits than its factorization.

4048021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368001922.

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 4048021021 is about 63624.0600795014. The cubic root of 4048021021 is about 1593.7281844385.

Adding to 4048021021 its reverse (1201208404), we get a palindrome (5249229425).

The spelling of 4048021021 in words is "four billion, forty-eight million, twenty-one thousand, twenty-one".