11222220111 has 16 divisors (see below), whose sum is σ = 15096474624. Its totient is φ = 7415020224.

The previous prime is 11222220077. The next prime is 11222220143. The reversal of 11222220111 is 11102222211.

It is a de Polignac number, because none of the positive numbers 2^k-11222220111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222220511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114915 + ... + 188811.

It is an arithmetic number, because the mean of its divisors is an integer number (943529664).

Almost surely, 2^11222220111 is an apocalyptic number.

11222220111 is a deficient number, since it is larger than the sum of its proper divisors (3874254513).

11222220111 is a wasteful number, since it uses less digits than its factorization.

11222220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74350.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11222220111 its reverse (11102222211), we get a palindrome (22324442322).

The spelling of 11222220111 in words is "eleven billion, two hundred twenty-two million, two hundred twenty thousand, one hundred eleven".