1211263303 has 2 divisors, whose sum is σ = 1211263304. Its totient is φ = 1211263302.

The previous prime is 1211263301. The next prime is 1211263309. The reversal of 1211263303 is 3033621121.

It is a weak prime.

It is an emirp because it is prime and its reverse (3033621121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1211263303 - 2¹ = 1211263301 is a prime.

Together with 1211263301, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211263301) 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, 605631651 + 605631652.

It is an arithmetic number, because the mean of its divisors is an integer number (605631652).

Almost surely, 2^1211263303 is an apocalyptic number.

1211263303 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211263303 is an equidigital number, since it uses as much as digits as its factorization.

1211263303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 1211263303 is about 34803.2082285527. The cubic root of 1211263303 is about 1065.9729558522.

Adding to 1211263303 its reverse (3033621121), we get a palindrome (4244884424).

The spelling of 1211263303 in words is "one billion, two hundred eleven million, two hundred sixty-three thousand, three hundred three".