4021342021 has 8 divisors (see below), whose sum is σ = 4077920960. Its totient is φ = 3964803552.

The previous prime is 4021342019. The next prime is 4021342049. The reversal of 4021342021 is 1202431204.

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

It is a cyclic number.

It is not a de Polignac number, because 4021342021 - 2¹ = 4021342019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4021342021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021342421) 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 7 ways as a sum of consecutive naturals, for example, 229456 + ... + 246358.

It is an arithmetic number, because the mean of its divisors is an integer number (509740120).

Almost surely, 2^4021342021 is an apocalyptic number.

It is an amenable number.

4021342021 is a deficient number, since it is larger than the sum of its proper divisors (56578939).

4021342021 is a wasteful number, since it uses less digits than its factorization.

4021342021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20235.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 4021342021 is about 63414.0522360778. The cubic root of 4021342021 is about 1590.2192412894.

Adding to 4021342021 its reverse (1202431204), we get a palindrome (5223773225).

The spelling of 4021342021 in words is "four billion, twenty-one million, three hundred forty-two thousand, twenty-one".