111211222049 has 2 divisors, whose sum is σ = 111211222050. Its totient is φ = 111211222048.

The previous prime is 111211221977. The next prime is 111211222061. The reversal of 111211222049 is 940222112111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108921121024 + 2290101025 = 330032^2 + 47855^2 .

It is an emirp because it is prime and its reverse (940222112111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111211222049 is a prime.

It is not a weakly prime, because it can be changed into another prime (111211222079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55605611024 + 55605611025.

It is an arithmetic number, because the mean of its divisors is an integer number (55605611025).

Almost surely, 2^111211222049 is an apocalyptic number.

It is an amenable number.

111211222049 is a deficient number, since it is larger than the sum of its proper divisors (1).

111211222049 is an equidigital number, since it uses as much as digits as its factorization.

111211222049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 111211222049 in words is "one hundred eleven billion, two hundred eleven million, two hundred twenty-two thousand, forty-nine".