11111210977 has 2 divisors, whose sum is σ = 11111210978. Its totient is φ = 11111210976.

The previous prime is 11111210953. The next prime is 11111210983. The reversal of 11111210977 is 77901211111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8953701376 + 2157509601 = 94624^2 + 46449^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111210977 - 2¹⁹ = 11110686689 is a prime.

It is not a weakly prime, because it can be changed into another prime (11111210927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555605488 + 5555605489.

It is an arithmetic number, because the mean of its divisors is an integer number (5555605489).

Almost surely, 2^11111210977 is an apocalyptic number.

It is an amenable number.

11111210977 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111210977 is an equidigital number, since it uses as much as digits as its factorization.

11111210977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 882, while the sum is 31.

The spelling of 11111210977 in words is "eleven billion, one hundred eleven million, two hundred ten thousand, nine hundred seventy-seven".