11310143221 has 4 divisors (see below), whose sum is σ = 12180154252. Its totient is φ = 10440132192.

The previous prime is 11310143189. The next prime is 11310143233. The reversal of 11310143221 is 12234101311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12234101311 = 19 ⋅643900069.

It can be written as a sum of positive squares in 2 ways, for example, as 6870586321 + 4439556900 = 82889^2 + 66630^2 .

It is a cyclic number.

It is not a de Polignac number, because 11310143221 - 2⁵ = 11310143189 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 (11310143921) 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, 435005496 + ... + 435005521.

It is an arithmetic number, because the mean of its divisors is an integer number (3045038563).

Almost surely, 2^11310143221 is an apocalyptic number.

It is an amenable number.

11310143221 is a deficient number, since it is larger than the sum of its proper divisors (870011031).

11310143221 is an equidigital number, since it uses as much as digits as its factorization.

11310143221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870011030.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 11310143221 its reverse (12234101311), we get a palindrome (23544244532).

The spelling of 11310143221 in words is "eleven billion, three hundred ten million, one hundred forty-three thousand, two hundred twenty-one".