4021133421 has 4 divisors (see below), whose sum is σ = 5361511232. Its totient is φ = 2680755612.

The previous prime is 4021133399. The next prime is 4021133423. The reversal of 4021133421 is 1243311204.

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 not a de Polignac number, because 4021133421 - 2⁹ = 4021132909 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 (4021133423) 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, 670188901 + ... + 670188906.

It is an arithmetic number, because the mean of its divisors is an integer number (1340377808).

Almost surely, 2^4021133421 is an apocalyptic number.

It is an amenable number.

4021133421 is a deficient number, since it is larger than the sum of its proper divisors (1340377811).

4021133421 is a wasteful number, since it uses less digits than its factorization.

4021133421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340377810.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 4021133421 is about 63412.4074688858. The cubic root of 4021133421 is about 1590.1917442111.

Adding to 4021133421 its reverse (1243311204), we get a palindrome (5264444625).

The spelling of 4021133421 in words is "four billion, twenty-one million, one hundred thirty-three thousand, four hundred twenty-one".