11223111211 has 8 divisors (see below), whose sum is σ = 12611924640. Its totient is φ = 9909368832.

The previous prime is 11223111139. The next prime is 11223111227. The reversal of 11223111211 is 11211132211.

It is a happy number.

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 11223111211 - 2²¹ = 11221014059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11223111611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18767446 + ... + 18768043.

It is an arithmetic number, because the mean of its divisors is an integer number (1576490580).

Almost surely, 2^11223111211 is an apocalyptic number.

11223111211 is a deficient number, since it is larger than the sum of its proper divisors (1388813429).

11223111211 is a wasteful number, since it uses less digits than its factorization.

11223111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37535525.

The product of its digits is 24, while the sum is 16.

Adding to 11223111211 its reverse (11211132211), we get a palindrome (22434243422).

The spelling of 11223111211 in words is "eleven billion, two hundred twenty-three million, one hundred eleven thousand, two hundred eleven".