11442231221 has 8 divisors (see below), whose sum is σ = 11634840888. Its totient is φ = 11249784000.

The previous prime is 11442231217. The next prime is 11442231233. The reversal of 11442231221 is 12213224411.

It can be written as a sum of positive squares in 4 ways, for example, as 2438878225 + 9003352996 = 49385^2 + 94886^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11442231221 - 2² = 11442231217 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 (11442231211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105851 + ... + 184631.

It is an arithmetic number, because the mean of its divisors is an integer number (1454355111).

Almost surely, 2^11442231221 is an apocalyptic number.

It is an amenable number.

11442231221 is a deficient number, since it is larger than the sum of its proper divisors (192609667).

11442231221 is an equidigital number, since it uses as much as digits as its factorization.

11442231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81223.

The product of its digits is 768, while the sum is 23.

Adding to 11442231221 its reverse (12213224411), we get a palindrome (23655455632).

The spelling of 11442231221 in words is "eleven billion, four hundred forty-two million, two hundred thirty-one thousand, two hundred twenty-one".