1311235133305 has 4 divisors (see below), whose sum is σ = 1573482159972. Its totient is φ = 1048988106640.

The previous prime is 1311235133231. The next prime is 1311235133357. The reversal of 1311235133305 is 5033315321131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 191820348729 + 1119414784576 = 437973^2 + 1058024^2 .

It is not a de Polignac number, because 1311235133305 - 2¹¹ = 1311235131257 is a prime.

It is a super-2 number, since 2×1311235133305² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131123513326 + ... + 131123513335.

It is an arithmetic number, because the mean of its divisors is an integer number (393370539993).

Almost surely, 2^{1311235133305} is an apocalyptic number.

It is an amenable number.

1311235133305 is a deficient number, since it is larger than the sum of its proper divisors (262247026667).

1311235133305 is an equidigital number, since it uses as much as digits as its factorization.

1311235133305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262247026666.

The product of its (nonzero) digits is 12150, while the sum is 31.

The spelling of 1311235133305 in words is "one trillion, three hundred eleven billion, two hundred thirty-five million, one hundred thirty-three thousand, three hundred five".