11243421138 has 16 divisors (see below), whose sum is σ = 23809597920. Its totient is φ = 3527347776.

The previous prime is 11243421107. The next prime is 11243421157. The reversal of 11243421138 is 83112434211.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55114708 + ... + 55114911.

It is an arithmetic number, because the mean of its divisors is an integer number (1488099870).

Almost surely, 2^11243421138 is an apocalyptic number.

11243421138 is an abundant number, since it is smaller than the sum of its proper divisors (12566176782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11243421138 is a wasteful number, since it uses less digits than its factorization.

11243421138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110229641.

The product of its digits is 4608, while the sum is 30.

Adding to 11243421138 its reverse (83112434211), we get a palindrome (94355855349).

The spelling of 11243421138 in words is "eleven billion, two hundred forty-three million, four hundred twenty-one thousand, one hundred thirty-eight".