11131221423443 has 24 divisors (see below), whose sum is σ = 12304065686640. Its totient is φ = 10062301550400.

The previous prime is 11131221423419. The next prime is 11131221423473. The reversal of 11131221423443 is 34432412213111.

It is not a de Polignac number, because 11131221423443 - 2⁴² = 6733174912339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11131221423473) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 259877753 + ... + 259920581.

It is an arithmetic number, because the mean of its divisors is an integer number (512669403610).

Almost surely, 2^{11131221423443} is an apocalyptic number.

11131221423443 is a deficient number, since it is larger than the sum of its proper divisors (1172844263197).

11131221423443 is a wasteful number, since it uses less digits than its factorization.

11131221423443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54899 (or 54888 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

Adding to 11131221423443 its reverse (34432412213111), we get a palindrome (45563633636554).

The spelling of 11131221423443 in words is "eleven trillion, one hundred thirty-one billion, two hundred twenty-one million, four hundred twenty-three thousand, four hundred forty-three".