11123434004221 has 112 divisors (see below), whose sum is σ = 15108767415360. Its totient is φ = 8097628734720.

The previous prime is 11123434004209. The next prime is 11123434004227. The reversal of 11123434004221 is 12240043432111.

It is a happy number.

It is not a de Polignac number, because 11123434004221 - 2⁷ = 11123434004093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11123434004221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11123434004227) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 1794967695 + ... + 1794973891.

Almost surely, 2^{11123434004221} is an apocalyptic number.

11123434004221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11123434004221 is a deficient number, since it is larger than the sum of its proper divisors (3985333411139).

11123434004221 is an frugal number, since it uses more digits than its factorization.

11123434004221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6342 (or 6307 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 11123434004221 its reverse (12240043432111), we get a palindrome (23363477436332).

The spelling of 11123434004221 in words is "eleven trillion, one hundred twenty-three billion, four hundred thirty-four million, four thousand, two hundred twenty-one".