1004222121 has 36 divisors (see below), whose sum is σ = 1613328912. Its totient is φ = 553985376.

The previous prime is 1004222119. The next prime is 1004222173. The reversal of 1004222121 is 1212224001.

It is not a de Polignac number, because 1004222121 - 2¹ = 1004222119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1004222121.

It is not an unprimeable number, because it can be changed into a prime (1004222101) 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 35 ways as a sum of consecutive naturals, for example, 119566 + ... + 127688.

It is an arithmetic number, because the mean of its divisors is an integer number (44814692).

Almost surely, 2^1004222121 is an apocalyptic number.

It is an amenable number.

1004222121 is a deficient number, since it is larger than the sum of its proper divisors (609106791).

1004222121 is an equidigital number, since it uses as much as digits as its factorization.

1004222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8198 (or 8162 counting only the distinct ones).

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

The square root of 1004222121 is about 31689.4638799712. The cubic root of 1004222121 is about 1001.4053975990.

Adding to 1004222121 its reverse (1212224001), we get a palindrome (2216446122).

The spelling of 1004222121 in words is "one billion, four million, two hundred twenty-two thousand, one hundred twenty-one".