1021201110971 has 2 divisors, whose sum is σ = 1021201110972. Its totient is φ = 1021201110970.

The previous prime is 1021201110947. The next prime is 1021201111027. The reversal of 1021201110971 is 1790111021201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021201110971 - 2⁶ = 1021201110907 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1021201110971.

It is not a weakly prime, because it can be changed into another prime (1021201119971) 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, 510600555485 + 510600555486.

It is an arithmetic number, because the mean of its divisors is an integer number (510600555486).

Almost surely, 2^{1021201110971} is an apocalyptic number.

1021201110971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021201110971 is an equidigital number, since it uses as much as digits as its factorization.

1021201110971 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 26.

The spelling of 1021201110971 in words is "one trillion, twenty-one billion, two hundred one million, one hundred ten thousand, nine hundred seventy-one".