11320221243 has 4 divisors (see below), whose sum is σ = 15093628328. Its totient is φ = 7546814160.

The previous prime is 11320221221. The next prime is 11320221247. The reversal of 11320221243 is 34212202311.

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

It is not a de Polignac number, because 11320221243 - 2⁸ = 11320220987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11320221247) 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, 1886703538 + ... + 1886703543.

It is an arithmetic number, because the mean of its divisors is an integer number (3773407082).

Almost surely, 2^11320221243 is an apocalyptic number.

11320221243 is a deficient number, since it is larger than the sum of its proper divisors (3773407085).

11320221243 is an equidigital number, since it uses as much as digits as its factorization.

11320221243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3773407084.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 11320221243 its reverse (34212202311), we get a palindrome (45532423554).

It can be divided in two parts, 1132022 and 1243, that added together give a triangular number (1133265 = T₁₅₀₅).

The spelling of 11320221243 in words is "eleven billion, three hundred twenty million, two hundred twenty-one thousand, two hundred forty-three".