11212211111077 has 2 divisors, whose sum is σ = 11212211111078. Its totient is φ = 11212211111076.

The previous prime is 11212211111051. The next prime is 11212211111119. The reversal of 11212211111077 is 77011111221211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10391603407201 + 820607703876 = 3223601^2 + 905874^2 .

It is an emirp because it is prime and its reverse (77011111221211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11212211111077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11212211111677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606105555538 + 5606105555539.

It is an arithmetic number, because the mean of its divisors is an integer number (5606105555539).

Almost surely, 2^{11212211111077} is an apocalyptic number.

It is an amenable number.

11212211111077 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212211111077 is an equidigital number, since it uses as much as digits as its factorization.

11212211111077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 392, while the sum is 28.

Adding to 11212211111077 its reverse (77011111221211), we get a palindrome (88223322332288).

The spelling of 11212211111077 in words is "eleven trillion, two hundred twelve billion, two hundred eleven million, one hundred eleven thousand, seventy-seven".