1311202113233 has 2 divisors, whose sum is σ = 1311202113234. Its totient is φ = 1311202113232.

The previous prime is 1311202113211. The next prime is 1311202113251. The reversal of 1311202113233 is 3323112021131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 786029415889 + 525172697344 = 886583^2 + 724688^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311202113233 - 2²² = 1311197918929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1311202113199 and 1311202113208.

It is not a weakly prime, because it can be changed into another prime (1311202113433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655601056616 + 655601056617.

It is an arithmetic number, because the mean of its divisors is an integer number (655601056617).

Almost surely, 2^{1311202113233} is an apocalyptic number.

It is an amenable number.

1311202113233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311202113233 is an equidigital number, since it uses as much as digits as its factorization.

1311202113233 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 23.

Adding to 1311202113233 its reverse (3323112021131), we get a palindrome (4634314134364).

The spelling of 1311202113233 in words is "one trillion, three hundred eleven billion, two hundred two million, one hundred thirteen thousand, two hundred thirty-three".