1004121121 has 4 divisors (see below), whose sum is σ = 1018263744. Its totient is φ = 989978500.

The previous prime is 1004121109. The next prime is 1004121163. The reversal of 1004121121 is 1211214001.

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: 1211214001 = 173 ⋅7001237.

It is a cyclic number.

It is not a de Polignac number, because 1004121121 - 2¹³ = 1004112929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1004121191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7071205 + ... + 7071346.

It is an arithmetic number, because the mean of its divisors is an integer number (254565936).

Almost surely, 2^1004121121 is an apocalyptic number.

It is an amenable number.

1004121121 is a deficient number, since it is larger than the sum of its proper divisors (14142623).

1004121121 is an equidigital number, since it uses as much as digits as its factorization.

1004121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14142622.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1004121121 is about 31687.8702503024. The cubic root of 1004121121 is about 1001.3718242377.

Adding to 1004121121 its reverse (1211214001), we get a palindrome (2215335122).

The spelling of 1004121121 in words is "one billion, four million, one hundred twenty-one thousand, one hundred twenty-one".