1011201021979 has 2 divisors, whose sum is σ = 1011201021980. Its totient is φ = 1011201021978.

The previous prime is 1011201021977. The next prime is 1011201022009. The reversal of 1011201021979 is 9791201021101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1011201021979 - 2¹ = 1011201021977 is a prime.

Together with 1011201021977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1011201021973) 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, 505600510989 + 505600510990.

It is an arithmetic number, because the mean of its divisors is an integer number (505600510990).

Almost surely, 2^{1011201021979} is an apocalyptic number.

1011201021979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011201021979 is an equidigital number, since it uses as much as digits as its factorization.

1011201021979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 34.

The spelling of 1011201021979 in words is "one trillion, eleven billion, two hundred one million, twenty-one thousand, nine hundred seventy-nine".