1001221000079 has 2 divisors, whose sum is σ = 1001221000080. Its totient is φ = 1001221000078.

The previous prime is 1001221000063. The next prime is 1001221000121. The reversal of 1001221000079 is 9700001221001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1001221000079 - 2⁴ = 1001221000063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001221000019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500610500039 + 500610500040.

It is an arithmetic number, because the mean of its divisors is an integer number (500610500040).

Almost surely, 2^{1001221000079} is an apocalyptic number.

1001221000079 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001221000079 is an equidigital number, since it uses as much as digits as its factorization.

1001221000079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 23.

The spelling of 1001221000079 in words is "one trillion, one billion, two hundred twenty-one million, seventy-nine", and thus it is an aban number.