111105426221 has 2 divisors, whose sum is σ = 111105426222. Its totient is φ = 111105426220.

The previous prime is 111105426199. The next prime is 111105426301. The reversal of 111105426221 is 122624501111.

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., 60880134121 + 50225292100 = 246739^2 + 224110^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111105426221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111105420221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55552713110 + 55552713111.

It is an arithmetic number, because the mean of its divisors is an integer number (55552713111).

Almost surely, 2^111105426221 is an apocalyptic number.

It is an amenable number.

111105426221 is a deficient number, since it is larger than the sum of its proper divisors (1).

111105426221 is an equidigital number, since it uses as much as digits as its factorization.

111105426221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 26.

Adding to 111105426221 its reverse (122624501111), we get a palindrome (233729927332).

The spelling of 111105426221 in words is "one hundred eleven billion, one hundred five million, four hundred twenty-six thousand, two hundred twenty-one".