1303211231813 has 2 divisors, whose sum is σ = 1303211231814. Its totient is φ = 1303211231812.

The previous prime is 1303211231801. The next prime is 1303211231821. The reversal of 1303211231813 is 3181321123031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 886491922369 + 416719309444 = 941537^2 + 645538^2 .

It is a cyclic number.

It is not a de Polignac number, because 1303211231813 - 2⁸ = 1303211231557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1303211230813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651605615906 + 651605615907.

It is an arithmetic number, because the mean of its divisors is an integer number (651605615907).

Almost surely, 2^{1303211231813} is an apocalyptic number.

It is an amenable number.

1303211231813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1303211231813 is an equidigital number, since it uses as much as digits as its factorization.

1303211231813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

Adding to 1303211231813 its reverse (3181321123031), we get a palindrome (4484532354844).

The spelling of 1303211231813 in words is "one trillion, three hundred three billion, two hundred eleven million, two hundred thirty-one thousand, eight hundred thirteen".