11403221111 has 4 divisors (see below), whose sum is σ = 11590159224. Its totient is φ = 11216283000.

The previous prime is 11403221107. The next prime is 11403221117. The reversal of 11403221111 is 11112230411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11112230411 = 29 ⋅383180359.

It is a cyclic number.

It is not a de Polignac number, because 11403221111 - 2² = 11403221107 is a prime.

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 11403221111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11403221117) 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, 93468965 + ... + 93469086.

It is an arithmetic number, because the mean of its divisors is an integer number (2897539806).

Almost surely, 2^11403221111 is an apocalyptic number.

11403221111 is a deficient number, since it is larger than the sum of its proper divisors (186938113).

11403221111 is an equidigital number, since it uses as much as digits as its factorization.

11403221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186938112.

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

Adding to 11403221111 its reverse (11112230411), we get a palindrome (22515451522).

The spelling of 11403221111 in words is "eleven billion, four hundred three million, two hundred twenty-one thousand, one hundred eleven".