11011221999977 has 2 divisors, whose sum is σ = 11011221999978. Its totient is φ = 11011221999976.

The previous prime is 11011221999971. The next prime is 11011222000021. The reversal of 11011221999977 is 77999912211011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8855974858201 + 2155247141776 = 2975899^2 + 1468076^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11011221999977 is a prime.

It is not a weakly prime, because it can be changed into another prime (11011221999971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505610999988 + 5505610999989.

It is an arithmetic number, because the mean of its divisors is an integer number (5505610999989).

Almost surely, 2^{11011221999977} is an apocalyptic number.

It is an amenable number.

11011221999977 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011221999977 is an equidigital number, since it uses as much as digits as its factorization.

11011221999977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1285956, while the sum is 59.

The spelling of 11011221999977 in words is "eleven trillion, eleven billion, two hundred twenty-one million, nine hundred ninety-nine thousand, nine hundred seventy-seven".