11423332221 has 12 divisors (see below), whose sum is σ = 17717821632. Its totient is φ = 6527618328.

The previous prime is 11423332163. The next prime is 11423332231. The reversal of 11423332221 is 12223332411.

It is not a de Polignac number, because 11423332221 - 2¹⁸ = 11423070077 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11423332191 and 11423332200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11423332231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38854725 + ... + 38855018.

It is an arithmetic number, because the mean of its divisors is an integer number (1476485136).

Almost surely, 2^11423332221 is an apocalyptic number.

It is an amenable number.

11423332221 is a deficient number, since it is larger than the sum of its proper divisors (6294489411).

11423332221 is an equidigital number, since it uses as much as digits as its factorization.

11423332221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77709760 (or 77709753 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

Adding to 11423332221 its reverse (12223332411), we get a palindrome (23646664632).

The spelling of 11423332221 in words is "eleven billion, four hundred twenty-three million, three hundred thirty-two thousand, two hundred twenty-one".