11533340633421 has 32 divisors (see below), whose sum is σ = 16126221496320. Its totient is φ = 7325929422144.

The previous prime is 11533340633401. The next prime is 11533340633557. The reversal of 11533340633421 is 12433604333511.

It is not a de Polignac number, because 11533340633421 - 2⁹ = 11533340632909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11533340633421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11533340633401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5873170 + ... + 7586883.

It is an arithmetic number, because the mean of its divisors is an integer number (503944421760).

Almost surely, 2^{11533340633421} is an apocalyptic number.

It is an amenable number.

11533340633421 is a deficient number, since it is larger than the sum of its proper divisors (4592880862899).

11533340633421 is a wasteful number, since it uses less digits than its factorization.

11533340633421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13460265.

The product of its (nonzero) digits is 233280, while the sum is 39.

Adding to 11533340633421 its reverse (12433604333511), we get a palindrome (23966944966932).

The spelling of 11533340633421 in words is "eleven trillion, five hundred thirty-three billion, three hundred forty million, six hundred thirty-three thousand, four hundred twenty-one".