111222122257 has 2 divisors, whose sum is σ = 111222122258. Its totient is φ = 111222122256.

The previous prime is 111222122131. The next prime is 111222122273. The reversal of 111222122257 is 752221222111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111081557521 + 140564736 = 333289^2 + 11856^2 .

It is a cyclic number.

It is not a de Polignac number, because 111222122257 - 2⁷ = 111222122129 is a prime.

It is not a weakly prime, because it can be changed into another prime (111222129257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55611061128 + 55611061129.

It is an arithmetic number, because the mean of its divisors is an integer number (55611061129).

Almost surely, 2^111222122257 is an apocalyptic number.

It is an amenable number.

111222122257 is a deficient number, since it is larger than the sum of its proper divisors (1).

111222122257 is an equidigital number, since it uses as much as digits as its factorization.

111222122257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2240, while the sum is 28.

Adding to 111222122257 its reverse (752221222111), we get a palindrome (863443344368).

The spelling of 111222122257 in words is "one hundred eleven billion, two hundred twenty-two million, one hundred twenty-two thousand, two hundred fifty-seven".