11112023221 has 4 divisors (see below), whose sum is σ = 11966794252. Its totient is φ = 10257252192.

The previous prime is 11112023183. The next prime is 11112023239. The reversal of 11112023221 is 12232021111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12232021111 = 547 ⋅22362013.

It can be written as a sum of positive squares in 2 ways, for example, as 4790024100 + 6321999121 = 69210^2 + 79511^2 .

It is a cyclic number.

It is not a de Polignac number, because 11112023221 - 2⁹ = 11112022709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11112023195 and 11112023204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112020221) 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, 427385496 + ... + 427385521.

It is an arithmetic number, because the mean of its divisors is an integer number (2991698563).

Almost surely, 2^11112023221 is an apocalyptic number.

It is an amenable number.

11112023221 is a deficient number, since it is larger than the sum of its proper divisors (854771031).

11112023221 is an equidigital number, since it uses as much as digits as its factorization.

11112023221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854771030.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 11112023221 its reverse (12232021111), we get a palindrome (23344044332).

The spelling of 11112023221 in words is "eleven billion, one hundred twelve million, twenty-three thousand, two hundred twenty-one".