11011110221977 has 2 divisors, whose sum is σ = 11011110221978. Its totient is φ = 11011110221976.

The previous prime is 11011110221933. The next prime is 11011110222023. The reversal of 11011110221977 is 77912201111011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8522102301696 + 2489007920281 = 2919264^2 + 1577659^2 .

It is an emirp because it is prime and its reverse (77912201111011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11011110221977 - 2³⁵ = 10976750483609 is a prime.

It is not a weakly prime, because it can be changed into another prime (11011110221927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505555110988 + 5505555110989.

It is an arithmetic number, because the mean of its divisors is an integer number (5505555110989).

Almost surely, 2^{11011110221977} is an apocalyptic number.

It is an amenable number.

11011110221977 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011110221977 is an equidigital number, since it uses as much as digits as its factorization.

11011110221977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 34.

Adding to 11011110221977 its reverse (77912201111011), we get a palindrome (88923311332988).

The spelling of 11011110221977 in words is "eleven trillion, eleven billion, one hundred ten million, two hundred twenty-one thousand, nine hundred seventy-seven".