11513325204421 has 4 divisors (see below), whose sum is σ = 11535339211072. Its totient is φ = 11491311197772.

The previous prime is 11513325204349. The next prime is 11513325204487. The reversal of 11513325204421 is 12440252331511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11513325204421 - 2¹³ = 11513325196229 is a prime.

It is a super-2 number, since 2×11513325204421² (a number of 27 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 (11513325214421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11007002541 + ... + 11007003586.

It is an arithmetic number, because the mean of its divisors is an integer number (2883834802768).

Almost surely, 2^{11513325204421} is an apocalyptic number.

It is an amenable number.

11513325204421 is a deficient number, since it is larger than the sum of its proper divisors (22014006651).

11513325204421 is an equidigital number, since it uses as much as digits as its factorization.

11513325204421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22014006650.

The product of its (nonzero) digits is 28800, while the sum is 34.

Adding to 11513325204421 its reverse (12440252331511), we get a palindrome (23953577535932).

The spelling of 11513325204421 in words is "eleven trillion, five hundred thirteen billion, three hundred twenty-five million, two hundred four thousand, four hundred twenty-one".