4023421121 has 4 divisors (see below), whose sum is σ = 4024028244. Its totient is φ = 4022814000.

The previous prime is 4023421117. The next prime is 4023421141. The reversal of 4023421121 is 1211243204.

4023421121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1154640400 + 2868780721 = 33980^2 + 53561^2 .

It is a cyclic number.

It is not a de Polignac number, because 4023421121 - 2² = 4023421117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4023421093 and 4023421102.

It is not an unprimeable number, because it can be changed into a prime (4023421141) 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, 293510 + ... + 306911.

It is an arithmetic number, because the mean of its divisors is an integer number (1006007061).

Almost surely, 2^4023421121 is an apocalyptic number.

It is an amenable number.

4023421121 is a deficient number, since it is larger than the sum of its proper divisors (607123).

4023421121 is an equidigital number, since it uses as much as digits as its factorization.

4023421121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607122.

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

The square root of 4023421121 is about 63430.4431720290. The cubic root of 4023421121 is about 1590.4932505778.

Adding to 4023421121 its reverse (1211243204), we get a palindrome (5234664325).

The spelling of 4023421121 in words is "four billion, twenty-three million, four hundred twenty-one thousand, one hundred twenty-one".