2004221121 has 16 divisors (see below), whose sum is σ = 3055075200. Its totient is φ = 1144885248.

The previous prime is 2004221119. The next prime is 2004221147. The reversal of 2004221121 is 1211224002.

It is not a de Polignac number, because 2004221121 - 2¹ = 2004221119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2004221121.

It is not an unprimeable number, because it can be changed into a prime (2004221101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55575 + ... + 84243.

It is an arithmetic number, because the mean of its divisors is an integer number (190942200).

Almost surely, 2^2004221121 is an apocalyptic number.

2004221121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2004221121 is a deficient number, since it is larger than the sum of its proper divisors (1050854079).

2004221121 is a wasteful number, since it uses less digits than its factorization.

2004221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32008.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 2004221121 is about 44768.5282425054. The cubic root of 2004221121 is about 1260.8068069059.

Adding to 2004221121 its reverse (1211224002), we get a palindrome (3215445123).

The spelling of 2004221121 in words is "two billion, four million, two hundred twenty-one thousand, one hundred twenty-one".