11222011111 has 8 divisors (see below), whose sum is σ = 11255698080. Its totient is φ = 11188364928.

The previous prime is 11222011109. The next prime is 11222011123. The reversal of 11222011111 is 11111022211.

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 11222011111 - 2¹ = 11222011109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11222011091 and 11222011100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222011181) 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, 593475 + ... + 612091.

It is an arithmetic number, because the mean of its divisors is an integer number (1406962260).

Almost surely, 2^11222011111 is an apocalyptic number.

11222011111 is a deficient number, since it is larger than the sum of its proper divisors (33686969).

11222011111 is a wasteful number, since it uses less digits than its factorization.

11222011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20393.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11222011111 its reverse (11111022211), we get a palindrome (22333033322).

The spelling of 11222011111 in words is "eleven billion, two hundred twenty-two million, eleven thousand, one hundred eleven".