11213231240221 has 4 divisors (see below), whose sum is σ = 11236256356192. Its totient is φ = 11190206124252.

The previous prime is 11213231240207. The next prime is 11213231240257. The reversal of 11213231240221 is 12204213231211.

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 11213231240221 - 2⁷ = 11213231240093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11213231240261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11512557255 + ... + 11512558228.

It is an arithmetic number, because the mean of its divisors is an integer number (2809064089048).

Almost surely, 2^{11213231240221} is an apocalyptic number.

It is an amenable number.

11213231240221 is a deficient number, since it is larger than the sum of its proper divisors (23025115971).

11213231240221 is an equidigital number, since it uses as much as digits as its factorization.

11213231240221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23025115970.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 11213231240221 its reverse (12204213231211), we get a palindrome (23417444471432).

The spelling of 11213231240221 in words is "eleven trillion, two hundred thirteen billion, two hundred thirty-one million, two hundred forty thousand, two hundred twenty-one".