1000033121 has 4 divisors (see below), whose sum is σ = 1004217600. Its totient is φ = 995848644.

The previous prime is 1000033117. The next prime is 1000033127. The reversal of 1000033121 is 1213300001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1213300001 = 4597 ⋅263933.

It is a cyclic number.

It is not a de Polignac number, because 1000033121 - 2² = 1000033117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000033127) 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 3 ways as a sum of consecutive naturals, for example, 2091881 + ... + 2092358.

It is an arithmetic number, because the mean of its divisors is an integer number (251054400).

Almost surely, 2^1000033121 is an apocalyptic number.

It is an amenable number.

1000033121 is a deficient number, since it is larger than the sum of its proper divisors (4184479).

1000033121 is an equidigital number, since it uses as much as digits as its factorization.

1000033121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4184478.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1000033121 is about 31623.3002863395. The cubic root of 1000033121 is about 1000.0110402114.

Adding to 1000033121 its reverse (1213300001), we get a palindrome (2213333122).

The spelling of 1000033121 in words is "one billion, thirty-three thousand, one hundred twenty-one".