1311222211313 has 4 divisors (see below), whose sum is σ = 1498539670080. Its totient is φ = 1123904752548.

The previous prime is 1311222211249. The next prime is 1311222211363. The reversal of 1311222211313 is 3131122221131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1311222211313 - 2⁶ = 1311222211249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311222211363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93658729373 + ... + 93658729386.

It is an arithmetic number, because the mean of its divisors is an integer number (374634917520).

Almost surely, 2^{1311222211313} is an apocalyptic number.

It is an amenable number.

1311222211313 is a deficient number, since it is larger than the sum of its proper divisors (187317458767).

1311222211313 is an equidigital number, since it uses as much as digits as its factorization.

1311222211313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187317458766.

The product of its digits is 432, while the sum is 23.

Adding to 1311222211313 its reverse (3131122221131), we get a palindrome (4442344432444).

It can be divided in two parts, 131122221131 and 3, that multiplied together give a palindrome (393366663393).

The spelling of 1311222211313 in words is "one trillion, three hundred eleven billion, two hundred twenty-two million, two hundred eleven thousand, three hundred thirteen".