135311011243 has 4 divisors (see below), whose sum is σ = 135311777440. Its totient is φ = 135310245048.

The previous prime is 135311011219. The next prime is 135311011259. The reversal of 135311011243 is 342110113531.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 342110113531 = 19 ⋅18005795449.

It is a cyclic number.

It is not a de Polignac number, because 135311011243 - 2²⁹ = 134774140331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135311011343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31021 + ... + 521137.

It is an arithmetic number, because the mean of its divisors is an integer number (33827944360).

Almost surely, 2^135311011243 is an apocalyptic number.

135311011243 is a deficient number, since it is larger than the sum of its proper divisors (766197).

135311011243 is an equidigital number, since it uses as much as digits as its factorization.

135311011243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766196.

The product of its (nonzero) digits is 1080, while the sum is 25.

Adding to 135311011243 its reverse (342110113531), we get a palindrome (477421124774).

The spelling of 135311011243 in words is "one hundred thirty-five billion, three hundred eleven million, eleven thousand, two hundred forty-three".