11011021999979 has 2 divisors, whose sum is σ = 11011021999980. Its totient is φ = 11011021999978.

The previous prime is 11011021999951. The next prime is 11011021999981. The reversal of 11011021999979 is 97999912011011.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11011021999979 - 2²⁸ = 11010753564523 is a prime.

It is a Sophie Germain prime.

Together with 11011021999981, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11011021990979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505510999989 + 5505510999990.

It is an arithmetic number, because the mean of its divisors is an integer number (5505510999990).

Almost surely, 2^{11011021999979} is an apocalyptic number.

11011021999979 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011021999979 is an equidigital number, since it uses as much as digits as its factorization.

11011021999979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 826686, while the sum is 59.

The spelling of 11011021999979 in words is "eleven trillion, eleven billion, twenty-one million, nine hundred ninety-nine thousand, nine hundred seventy-nine".