4004450121 has 96 divisors (see below), whose sum is σ = 6671250432. Its totient is φ = 2091196800.

The previous prime is 4004450119. The next prime is 4004450159. The reversal of 4004450121 is 1210544004.

It is a happy number.

It is not a de Polignac number, because 4004450121 - 2¹ = 4004450119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (4004458121) 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 95 ways as a sum of consecutive naturals, for example, 39647971 + ... + 39648071.

It is an arithmetic number, because the mean of its divisors is an integer number (69492192).

Almost surely, 2^4004450121 is an apocalyptic number.

It is an amenable number.

4004450121 is a deficient number, since it is larger than the sum of its proper divisors (2666800311).

4004450121 is a wasteful number, since it uses less digits than its factorization.

4004450121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283 (or 260 counting only the distinct ones).

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

The square root of 4004450121 is about 63280.7247193014. The cubic root of 4004450121 is about 1587.9895110257.

Adding to 4004450121 its reverse (1210544004), we get a palindrome (5214994125).

The spelling of 4004450121 in words is "four billion, four million, four hundred fifty thousand, one hundred twenty-one".