11423021111 has 8 divisors (see below), whose sum is σ = 11703086304. Its totient is φ = 11143025280.

The previous prime is 11423021083. The next prime is 11423021117. The reversal of 11423021111 is 11112032411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11423021111 - 2¹⁰ = 11423020087 is a prime.

It is a super-2 number, since 2×11423021111² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11423021111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11423021117) 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 7 ways as a sum of consecutive naturals, for example, 509606 + ... + 531548.

It is an arithmetic number, because the mean of its divisors is an integer number (1462885788).

Almost surely, 2^11423021111 is an apocalyptic number.

11423021111 is a deficient number, since it is larger than the sum of its proper divisors (280065193).

11423021111 is a wasteful number, since it uses less digits than its factorization.

11423021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34681.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 11423021111 its reverse (11112032411), we get a palindrome (22535053522).

The spelling of 11423021111 in words is "eleven billion, four hundred twenty-three million, twenty-one thousand, one hundred eleven".