135020131243 has 8 divisors (see below), whose sum is σ = 142176678800. Its totient is φ = 127868606208.

The previous prime is 135020131231. The next prime is 135020131277. The reversal of 135020131243 is 342131020531.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135020131243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135020131223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1200378 + ... + 1308031.

It is an arithmetic number, because the mean of its divisors is an integer number (17772084850).

Almost surely, 2^135020131243 is an apocalyptic number.

135020131243 is a deficient number, since it is larger than the sum of its proper divisors (7156547557).

135020131243 is a wasteful number, since it uses less digits than its factorization.

135020131243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2511261.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 135020131243 its reverse (342131020531), we get a palindrome (477151151774).

The spelling of 135020131243 in words is "one hundred thirty-five billion, twenty million, one hundred thirty-one thousand, two hundred forty-three".