1004203121 has 2 divisors, whose sum is σ = 1004203122. Its totient is φ = 1004203120.

The previous prime is 1004203099. The next prime is 1004203127. The reversal of 1004203121 is 1213024001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 881436721 + 122766400 = 29689^2 + 11080^2 .

It is a cyclic number.

It is not a de Polignac number, because 1004203121 - 2¹⁴ = 1004186737 is a prime.

It is a super-2 number, since 2×1004203121² = 2016847816452281282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1004203096 and 1004203105.

It is not a weakly prime, because it can be changed into another prime (1004203127) 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 as a sum of consecutive naturals, namely, 502101560 + 502101561.

It is an arithmetic number, because the mean of its divisors is an integer number (502101561).

Almost surely, 2^1004203121 is an apocalyptic number.

It is an amenable number.

1004203121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1004203121 is an equidigital number, since it uses as much as digits as its factorization.

1004203121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1004203121 is about 31689.1640943714. The cubic root of 1004203121 is about 1001.3990819900.

Adding to 1004203121 its reverse (1213024001), we get a palindrome (2217227122).

The spelling of 1004203121 in words is "one billion, four million, two hundred three thousand, one hundred twenty-one".