1320212123 has 2 divisors, whose sum is σ = 1320212124. Its totient is φ = 1320212122.

The previous prime is 1320212083. The next prime is 1320212137. The reversal of 1320212123 is 3212120231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1320212123 - 2¹⁸ = 1319949979 is a prime.

It is not a weakly prime, because it can be changed into another prime (1320214123) 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, 660106061 + 660106062.

It is an arithmetic number, because the mean of its divisors is an integer number (660106062).

Almost surely, 2^1320212123 is an apocalyptic number.

1320212123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320212123 is an equidigital number, since it uses as much as digits as its factorization.

1320212123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1320212123 is about 36334.7233786085. The cubic root of 1320212123 is about 1097.0200676231.

Adding to 1320212123 its reverse (3212120231), we get a palindrome (4532332354).

The spelling of 1320212123 in words is "one billion, three hundred twenty million, two hundred twelve thousand, one hundred twenty-three".