222211221111 has 48 divisors (see below), whose sum is σ = 351842343840. Its totient is φ = 134024098560.

The previous prime is 222211221103. The next prime is 222211221119. The reversal of 222211221111 is 111122112222.

222211221111 is a `hidden beast` number, since 222 + 211 + 221 + 1 + 11 = 666.

It is an interprime number because it is at equal distance from previous prime (222211221103) and next prime (222211221119).

It is not a de Polignac number, because 222211221111 - 2³ = 222211221103 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222211221119) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26973085 + ... + 26981321.

It is an arithmetic number, because the mean of its divisors is an integer number (7330048830).

Almost surely, 2^222211221111 is an apocalyptic number.

222211221111 is a deficient number, since it is larger than the sum of its proper divisors (129631122729).

222211221111 is a wasteful number, since it uses less digits than its factorization.

222211221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9536 (or 9533 counting only the distinct ones).

The product of its digits is 64, while the sum is 18.

Adding to 222211221111 its reverse (111122112222), we get a palindrome (333333333333).

It can be divided in two parts, 2222112211 and 11, that added together give a palindrome (2222112222).

The spelling of 222211221111 in words is "two hundred twenty-two billion, two hundred eleven million, two hundred twenty-one thousand, one hundred eleven".