4020425121 has 16 divisors (see below), whose sum is σ = 5547836160. Its totient is φ = 2586729600.

The previous prime is 4020425119. The next prime is 4020425147. The reversal of 4020425121 is 1215240204.

It is not a de Polignac number, because 4020425121 - 2¹ = 4020425119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4020425111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220296 + ... + 237846.

It is an arithmetic number, because the mean of its divisors is an integer number (346739760).

Almost surely, 2^4020425121 is an apocalyptic number.

It is an amenable number.

4020425121 is a deficient number, since it is larger than the sum of its proper divisors (1527411039).

4020425121 is a wasteful number, since it uses less digits than its factorization.

4020425121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20216.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 4020425121 is about 63406.8223537499. The cubic root of 4020425121 is about 1590.0983709559.

Adding to 4020425121 its reverse (1215240204), we get a palindrome (5235665325).

The spelling of 4020425121 in words is "four billion, twenty million, four hundred twenty-five thousand, one hundred twenty-one".