11242002221 has 4 divisors (see below), whose sum is σ = 11629657500. Its totient is φ = 10854346944.

The previous prime is 11242002217. The next prime is 11242002227. The reversal of 11242002221 is 12220024211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6211646596 + 5030355625 = 78814^2 + 70925^2 .

It is a cyclic number.

It is not a de Polignac number, because 11242002221 - 2² = 11242002217 is a prime.

It is a super-2 number, since 2×11242002221² (a number of 21 digits) contains 22 as substring.

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 11242002221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11242002227) 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, 193827596 + ... + 193827653.

It is an arithmetic number, because the mean of its divisors is an integer number (2907414375).

Almost surely, 2^11242002221 is an apocalyptic number.

It is an amenable number.

11242002221 is a deficient number, since it is larger than the sum of its proper divisors (387655279).

11242002221 is an equidigital number, since it uses as much as digits as its factorization.

11242002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387655278.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 11242002221 its reverse (12220024211), we get a palindrome (23462026432).

The spelling of 11242002221 in words is "eleven billion, two hundred forty-two million, two thousand, two hundred twenty-one".