1012001001971 has 2 divisors, whose sum is σ = 1012001001972. Its totient is φ = 1012001001970.

The previous prime is 1012001001961. The next prime is 1012001002007. The reversal of 1012001001971 is 1791001002101.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1012001001971 - 2²⁶ = 1011933893107 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1012001001961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506000500985 + 506000500986.

It is an arithmetic number, because the mean of its divisors is an integer number (506000500986).

Almost surely, 2^{1012001001971} is an apocalyptic number.

1012001001971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012001001971 is an equidigital number, since it uses as much as digits as its factorization.

1012001001971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 23.

The spelling of 1012001001971 in words is "one trillion, twelve billion, one million, one thousand, nine hundred seventy-one".