111112222211 has 2 divisors, whose sum is σ = 111112222212. Its totient is φ = 111112222210.

The previous prime is 111112222187. The next prime is 111112222279. The reversal of 111112222211 is 112222211111.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111112222211 is a prime.

It is a Sophie Germain prime.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 111112222211.

It is not a weakly prime, because it can be changed into another prime (111112227211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55556111105 + 55556111106.

It is an arithmetic number, because the mean of its divisors is an integer number (55556111106).

Almost surely, 2^111112222211 is an apocalyptic number.

111112222211 is a deficient number, since it is larger than the sum of its proper divisors (1).

111112222211 is an equidigital number, since it uses as much as digits as its factorization.

111112222211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32, while the sum is 17.

Adding to 111112222211 its reverse (112222211111), we get a palindrome (223334433322).

It can be divided in two parts, 11111 and 2222211, that added together give a palindrome (2233322).

The spelling of 111112222211 in words is "one hundred eleven billion, one hundred twelve million, two hundred twenty-two thousand, two hundred eleven".