11233423021 has 4 divisors (see below), whose sum is σ = 11282477500. Its totient is φ = 11184368544.

The previous prime is 11233422983. The next prime is 11233423063. The reversal of 11233423021 is 12032433211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12032433211 = 92921 ⋅129491.

It can be written as a sum of positive squares in 2 ways, for example, as 7113066921 + 4120356100 = 84339^2 + 64190^2 .

It is a cyclic number.

It is not a de Polignac number, because 11233423021 - 2⁹ = 11233422509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11233422983 and 11233423001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11233423921) 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, 24526896 + ... + 24527353.

It is an arithmetic number, because the mean of its divisors is an integer number (2820619375).

Almost surely, 2^11233423021 is an apocalyptic number.

It is an amenable number.

11233423021 is a deficient number, since it is larger than the sum of its proper divisors (49054479).

11233423021 is an equidigital number, since it uses as much as digits as its factorization.

11233423021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49054478.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 11233423021 its reverse (12032433211), we get a palindrome (23265856232).

The spelling of 11233423021 in words is "eleven billion, two hundred thirty-three million, four hundred twenty-three thousand, twenty-one".