1011111019979 has 2 divisors, whose sum is σ = 1011111019980. Its totient is φ = 1011111019978.

The previous prime is 1011111019907. The next prime is 1011111020021. The reversal of 1011111019979 is 9799101111101.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011111019979 is a prime.

It is not a weakly prime, because it can be changed into another prime (1011111019679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505555509989 + 505555509990.

It is an arithmetic number, because the mean of its divisors is an integer number (505555509990).

Almost surely, 2^{1011111019979} is an apocalyptic number.

1011111019979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011111019979 is an equidigital number, since it uses as much as digits as its factorization.

1011111019979 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 1011111019979 in words is "one trillion, eleven billion, one hundred eleven million, nineteen thousand, nine hundred seventy-nine".