135511431335021 has 8 divisors (see below), whose sum is σ = 154911760853760. Its totient is φ = 116121490219728.

The previous prime is 135511431334969. The next prime is 135511431335207. The reversal of 135511431335021 is 120533134115531.

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

It is not a de Polignac number, because 135511431335021 - 2²⁶ = 135511364226157 is a prime.

It is a super-2 number, since 2×135511431335021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135511451335021) 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 7 ways as a sum of consecutive naturals, for example, 2597072906 + ... + 2597125083.

It is an arithmetic number, because the mean of its divisors is an integer number (19363970106720).

Almost surely, 2^{135511431335021} is an apocalyptic number.

It is an amenable number.

135511431335021 is a deficient number, since it is larger than the sum of its proper divisors (19400329518739).

135511431335021 is an equidigital number, since it uses as much as digits as its factorization.

135511431335021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5194201723.

The product of its (nonzero) digits is 81000, while the sum is 38.

The spelling of 135511431335021 in words is "one hundred thirty-five trillion, five hundred eleven billion, four hundred thirty-one million, three hundred thirty-five thousand, twenty-one".