11230021111 has 4 divisors (see below), whose sum is σ = 11230488000. Its totient is φ = 11229554224.

The previous prime is 11230021087. The next prime is 11230021171. The reversal of 11230021111 is 11112003211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11112003211 = 15467 ⋅718433.

It is a cyclic number.

It is not a de Polignac number, because 11230021111 - 2⁷ = 11230020983 is a prime.

It is a super-2 number, since 2×11230021111² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11230021091 and 11230021100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11230021171) 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, 195286 + ... + 246163.

It is an arithmetic number, because the mean of its divisors is an integer number (2807622000).

Almost surely, 2^11230021111 is an apocalyptic number.

11230021111 is a deficient number, since it is larger than the sum of its proper divisors (466889).

11230021111 is an equidigital number, since it uses as much as digits as its factorization.

11230021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466888.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 11230021111 its reverse (11112003211), we get a palindrome (22342024322).

The spelling of 11230021111 in words is "eleven billion, two hundred thirty million, twenty-one thousand, one hundred eleven".