11144342221 has 4 divisors (see below), whose sum is σ = 11148498592. Its totient is φ = 11140185852.

The previous prime is 11144342219. The next prime is 11144342249. The reversal of 11144342221 is 12224344111.

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 11144342221 - 2¹ = 11144342219 is a prime.

It is a super-3 number, since 3×11144342221³ (a number of 31 digits) contains 333 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 (11144342201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2074161 + ... + 2079526.

It is an arithmetic number, because the mean of its divisors is an integer number (2787124648).

Almost surely, 2^11144342221 is an apocalyptic number.

It is an amenable number.

11144342221 is a deficient number, since it is larger than the sum of its proper divisors (4156371).

11144342221 is an equidigital number, since it uses as much as digits as its factorization.

11144342221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4156370.

The product of its digits is 1536, while the sum is 25.

Adding to 11144342221 its reverse (12224344111), we get a palindrome (23368686332).

It can be divided in two parts, 111443 and 42221, that added together give a square (153664 = 392²).

The spelling of 11144342221 in words is "eleven billion, one hundred forty-four million, three hundred forty-two thousand, two hundred twenty-one".