135203311130023 has 4 divisors (see below), whose sum is σ = 137419758853528. Its totient is φ = 132986863406520.

The previous prime is 135203311130021. The next prime is 135203311130077. The reversal of 135203311130023 is 320031113302531.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 135203311130023 - 2¹ = 135203311130021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135203311129973 and 135203311130000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135203311130021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1108223861661 + ... + 1108223861782.

It is an arithmetic number, because the mean of its divisors is an integer number (34354939713382).

Almost surely, 2^{135203311130023} is an apocalyptic number.

135203311130023 is a deficient number, since it is larger than the sum of its proper divisors (2216447723505).

135203311130023 is an equidigital number, since it uses as much as digits as its factorization.

135203311130023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2216447723504.

The product of its (nonzero) digits is 4860, while the sum is 28.

Adding to 135203311130023 its reverse (320031113302531), we get a palindrome (455234424432554).

The spelling of 135203311130023 in words is "one hundred thirty-five trillion, two hundred three billion, three hundred eleven million, one hundred thirty thousand, twenty-three".