220011111 has 12 divisors (see below), whose sum is σ = 319551960. Its totient is φ = 145862640.

The previous prime is 220011107. The next prime is 220011149. The reversal of 220011111 is 111110022.

It is a happy number.

It is not a de Polignac number, because 220011111 - 2² = 220011107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

220011111 is a modest number, since divided by 11111 gives 2200 as remainder.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 220011093 and 220011102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220011151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65901 + ... + 69158.

It is an arithmetic number, because the mean of its divisors is an integer number (26629330).

Almost surely, 2^220011111 is an apocalyptic number.

220011111 is a deficient number, since it is larger than the sum of its proper divisors (99540849).

220011111 is a wasteful number, since it uses less digits than its factorization.

220011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135246 (or 135243 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 220011111 is about 14832.7715211959. The cubic root of 220011111 is about 603.6912363881.

Adding to 220011111 its reverse (111110022), we get a palindrome (331121133).

The spelling of 220011111 in words is "two hundred twenty million, eleven thousand, one hundred eleven".