21032401255135 has 4 divisors (see below), whose sum is σ = 25238881506168. Its totient is φ = 16825921004104.

The previous prime is 21032401255111. The next prime is 21032401255153. The reversal of 21032401255135 is 53155210423012.

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 21032401255135 - 2¹⁵ = 21032401222367 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21032401255135.

It is a congruent 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, 2103240125509 + ... + 2103240125518.

It is an arithmetic number, because the mean of its divisors is an integer number (6309720376542).

Almost surely, 2^{21032401255135} is an apocalyptic number.

21032401255135 is a deficient number, since it is larger than the sum of its proper divisors (4206480251033).

21032401255135 is an equidigital number, since it uses as much as digits as its factorization.

21032401255135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4206480251032.

The product of its (nonzero) digits is 36000, while the sum is 34.

Adding to 21032401255135 its reverse (53155210423012), we get a palindrome (74187611678147).

The spelling of 21032401255135 in words is "twenty-one trillion, thirty-two billion, four hundred one million, two hundred fifty-five thousand, one hundred thirty-five".