1204006121 has 2 divisors, whose sum is σ = 1204006122. Its totient is φ = 1204006120.

The previous prime is 1204006081. The next prime is 1204006157. The reversal of 1204006121 is 1216004021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 790453225 + 413552896 = 28115^2 + 20336^2 .

It is a cyclic number.

It is not a de Polignac number, because 1204006121 - 2³⁰ = 130264297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1204006121.

It is not a weakly prime, because it can be changed into another prime (1204006621) 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 as a sum of consecutive naturals, namely, 602003060 + 602003061.

It is an arithmetic number, because the mean of its divisors is an integer number (602003061).

Almost surely, 2^1204006121 is an apocalyptic number.

It is an amenable number.

1204006121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1204006121 is an equidigital number, since it uses as much as digits as its factorization.

1204006121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1204006121 is about 34698.7913478265. The cubic root of 1204006121 is about 1063.8397942338.

The spelling of 1204006121 in words is "one billion, two hundred four million, six thousand, one hundred twenty-one".