11112211221077 has 2 divisors, whose sum is σ = 11112211221078. Its totient is φ = 11112211221076.

The previous prime is 11112211221011. The next prime is 11112211221143. The reversal of 11112211221077 is 77012211221111.

It is a balanced prime because it is at equal distance from previous prime (11112211221011) and next prime (11112211221143).

It can be written as a sum of positive squares in only one way, i.e., 6934790293201 + 4177420927876 = 2633399^2 + 2043874^2 .

It is an emirp because it is prime and its reverse (77012211221111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11112211221077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11112211227077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556105610538 + 5556105610539.

It is an arithmetic number, because the mean of its divisors is an integer number (5556105610539).

Almost surely, 2^{11112211221077} is an apocalyptic number.

It is an amenable number.

11112211221077 is a deficient number, since it is larger than the sum of its proper divisors (1).

11112211221077 is an equidigital number, since it uses as much as digits as its factorization.

11112211221077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 784, while the sum is 29.

Adding to 11112211221077 its reverse (77012211221111), we get a palindrome (88124422442188).

The spelling of 11112211221077 in words is "eleven trillion, one hundred twelve billion, two hundred eleven million, two hundred twenty-one thousand, seventy-seven".