4221134021 has 8 divisors (see below), whose sum is σ = 4546341240. Its totient is φ = 3895998912.

The previous prime is 4221133999. The next prime is 4221134171. The reversal of 4221134021 is 1204311224.

4221134021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 92428996 + 4128705025 = 9614^2 + 64255^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4221134021 - 2²² = 4216939717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4221133984 and 4221134002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221134321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222131 + ... + 240383.

It is an arithmetic number, because the mean of its divisors is an integer number (568292655).

Almost surely, 2^4221134021 is an apocalyptic number.

It is an amenable number.

4221134021 is a deficient number, since it is larger than the sum of its proper divisors (325207219).

4221134021 is a wasteful number, since it uses less digits than its factorization.

4221134021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36055.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 4221134021 is about 64970.2548940667. The cubic root of 4221134021 is about 1616.1303286560.

Adding to 4221134021 its reverse (1204311224), we get a palindrome (5425445245).

The spelling of 4221134021 in words is "four billion, two hundred twenty-one million, one hundred thirty-four thousand, twenty-one".