1320121303 has 2 divisors, whose sum is σ = 1320121304. Its totient is φ = 1320121302.

The previous prime is 1320121277. The next prime is 1320121333. The reversal of 1320121303 is 3031210231.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320121303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320121333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660060651 + 660060652.

It is an arithmetic number, because the mean of its divisors is an integer number (660060652).

Almost surely, 2^1320121303 is an apocalyptic number.

1320121303 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320121303 is an equidigital number, since it uses as much as digits as its factorization.

1320121303 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 16.

The square root of 1320121303 is about 36333.4735884143. The cubic root of 1320121303 is about 1096.9949116537.

Adding to 1320121303 its reverse (3031210231), we get a palindrome (4351331534).

The spelling of 1320121303 in words is "one billion, three hundred twenty million, one hundred twenty-one thousand, three hundred three".