1330123121 has 2 divisors, whose sum is σ = 1330123122. Its totient is φ = 1330123120.

The previous prime is 1330123087. The next prime is 1330123153. The reversal of 1330123121 is 1213210331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1308630625 + 21492496 = 36175^2 + 4636^2 .

It is a cyclic number.

It is not a de Polignac number, because 1330123121 - 2¹⁰ = 1330122097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1330123121.

It is not a weakly prime, because it can be changed into another prime (1330123181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665061560 + 665061561.

It is an arithmetic number, because the mean of its divisors is an integer number (665061561).

Almost surely, 2^1330123121 is an apocalyptic number.

It is an amenable number.

1330123121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1330123121 is an equidigital number, since it uses as much as digits as its factorization.

1330123121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1330123121 is about 36470.8530336212. The cubic root of 1330123121 is about 1099.7583824692.

Adding to 1330123121 its reverse (1213210331), we get a palindrome (2543333452).

The spelling of 1330123121 in words is "one billion, three hundred thirty million, one hundred twenty-three thousand, one hundred twenty-one".