11320232221 has 4 divisors (see below), whose sum is σ = 11986128252. Its totient is φ = 10654336192.

The previous prime is 11320232219. The next prime is 11320232233. The reversal of 11320232221 is 12223202311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12223202311 = 10267 ⋅1190533.

It can be written as a sum of positive squares in 2 ways, for example, as 8700225625 + 2620006596 = 93275^2 + 51186^2 .

It is a cyclic number.

It is not a de Polignac number, because 11320232221 - 2¹ = 11320232219 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 (11320232291) 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, 332947990 + ... + 332948023.

It is an arithmetic number, because the mean of its divisors is an integer number (2996532063).

Almost surely, 2^11320232221 is an apocalyptic number.

It is an amenable number.

11320232221 is a deficient number, since it is larger than the sum of its proper divisors (665896031).

11320232221 is an equidigital number, since it uses as much as digits as its factorization.

11320232221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665896030.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 11320232221 its reverse (12223202311), we get a palindrome (23543434532).

The spelling of 11320232221 in words is "eleven billion, three hundred twenty million, two hundred thirty-two thousand, two hundred twenty-one".