1000021201279 has 2 divisors, whose sum is σ = 1000021201280. Its totient is φ = 1000021201278.

The previous prime is 1000021201273. The next prime is 1000021201331. The reversal of 1000021201279 is 9721021200001.

It is a weak prime.

It is an emirp because it is prime and its reverse (9721021200001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000021201279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000021201273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500010600639 + 500010600640.

It is an arithmetic number, because the mean of its divisors is an integer number (500010600640).

Almost surely, 2^{1000021201279} is an apocalyptic number.

1000021201279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000021201279 is an equidigital number, since it uses as much as digits as its factorization.

1000021201279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 25.

The spelling of 1000021201279 in words is "one trillion, twenty-one million, two hundred one thousand, two hundred seventy-nine".