11223043421 has 4 divisors (see below), whose sum is σ = 11294527932. Its totient is φ = 11151558912.

The previous prime is 11223043393. The next prime is 11223043423. The reversal of 11223043421 is 12434032211.

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 3456146521 + 7766896900 = 58789^2 + 88130^2 .

It is a cyclic number.

It is not a de Polignac number, because 11223043421 - 2¹⁸ = 11222781277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11223043423) 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, 35742020 + ... + 35742333.

It is an arithmetic number, because the mean of its divisors is an integer number (2823631983).

Almost surely, 2^11223043421 is an apocalyptic number.

It is an amenable number.

11223043421 is a deficient number, since it is larger than the sum of its proper divisors (71484511).

11223043421 is an equidigital number, since it uses as much as digits as its factorization.

11223043421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71484510.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 11223043421 its reverse (12434032211), we get a palindrome (23657075632).

The spelling of 11223043421 in words is "eleven billion, two hundred twenty-three million, forty-three thousand, four hundred twenty-one".