11234421043421 has 4 divisors (see below), whose sum is σ = 11388317222172. Its totient is φ = 11080524864672.

The previous prime is 11234421043379. The next prime is 11234421043429. The reversal of 11234421043421 is 12434012443211.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6702993492196 + 4531427551225 = 2589014^2 + 2128715^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11234421043421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11234421043429) 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, 76948089266 + ... + 76948089411.

It is an arithmetic number, because the mean of its divisors is an integer number (2847079305543).

Almost surely, 2^{11234421043421} is an apocalyptic number.

It is an amenable number.

11234421043421 is a deficient number, since it is larger than the sum of its proper divisors (153896178751).

11234421043421 is an equidigital number, since it uses as much as digits as its factorization.

11234421043421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153896178750.

The product of its (nonzero) digits is 18432, while the sum is 32.

Adding to 11234421043421 its reverse (12434012443211), we get a palindrome (23668433486632).

The spelling of 11234421043421 in words is "eleven trillion, two hundred thirty-four billion, four hundred twenty-one million, forty-three thousand, four hundred twenty-one".