11143221536 has 24 divisors (see below), whose sum is σ = 23092861680. Its totient is φ = 5278367808.

The previous prime is 11143221533. The next prime is 11143221547. The reversal of 11143221536 is 63512234111.

It is a junction number, because it is equal to n+sod(n) for n = 11143221499 and 11143221508.

It is not an unprimeable number, because it can be changed into a prime (11143221533) 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, 9163226 + ... + 9164441.

It is an arithmetic number, because the mean of its divisors is an integer number (962202570).

Almost surely, 2^11143221536 is an apocalyptic number.

11143221536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11143221536 is an abundant number, since it is smaller than the sum of its proper divisors (11949640144).

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

11143221536 is a wasteful number, since it uses less digits than its factorization.

11143221536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18327696 (or 18327688 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

Adding to 11143221536 its reverse (63512234111), we get a palindrome (74655455647).

The spelling of 11143221536 in words is "eleven billion, one hundred forty-three million, two hundred twenty-one thousand, five hundred thirty-six".