11111101009979 has 2 divisors, whose sum is σ = 11111101009980. Its totient is φ = 11111101009978.

The previous prime is 11111101009927. The next prime is 11111101009993. The reversal of 11111101009979 is 97990010111111.

It is a strong prime.

It is an emirp because it is prime and its reverse (97990010111111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11111101009979 is a prime.

It is not a weakly prime, because it can be changed into another prime (11111101009909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555550504989 + 5555550504990.

It is an arithmetic number, because the mean of its divisors is an integer number (5555550504990).

Almost surely, 2^{11111101009979} is an apocalyptic number.

11111101009979 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111101009979 is an equidigital number, since it uses as much as digits as its factorization.

11111101009979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5103, while the sum is 41.

The spelling of 11111101009979 in words is "eleven trillion, one hundred eleven billion, one hundred one million, nine thousand, nine hundred seventy-nine".