1000002201971 has 2 divisors, whose sum is σ = 1000002201972. Its totient is φ = 1000002201970.

The previous prime is 1000002201967. The next prime is 1000002202039. The reversal of 1000002201971 is 1791022000001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1000002201971 - 2² = 1000002201967 is a prime.

It is not a weakly prime, because it can be changed into another prime (1000002201901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500001100985 + 500001100986.

It is an arithmetic number, because the mean of its divisors is an integer number (500001100986).

Almost surely, 2^{1000002201971} is an apocalyptic number.

1000002201971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000002201971 is an equidigital number, since it uses as much as digits as its factorization.

1000002201971 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.

Adding to 1000002201971 its reverse (1791022000001), we get a palindrome (2791024201972).

The spelling of 1000002201971 in words is "one trillion, two million, two hundred one thousand, nine hundred seventy-one".