111111112222237 has 2 divisors, whose sum is σ = 111111112222238. Its totient is φ = 111111112222236.

The previous prime is 111111112222217. The next prime is 111111112222361. The reversal of 111111112222237 is 732222211111111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98780262258276 + 12330849963961 = 9938826^2 + 3511531^2 .

It is a cyclic number.

It is not a de Polignac number, because 111111112222237 - 2¹¹ = 111111112220189 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111111112222217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555556111118 + 55555556111119.

It is an arithmetic number, because the mean of its divisors is an integer number (55555556111119).

Almost surely, 2^{111111112222237} is an apocalyptic number.

It is an amenable number.

111111112222237 is a deficient number, since it is larger than the sum of its proper divisors (1).

111111112222237 is an equidigital number, since it uses as much as digits as its factorization.

111111112222237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672, while the sum is 28.

Adding to 111111112222237 its reverse (732222211111111), we get a palindrome (843333323333348).

The spelling of 111111112222237 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred twelve million, two hundred twenty-two thousand, two hundred thirty-seven".