20012002199971 has 2 divisors, whose sum is σ = 20012002199972. Its totient is φ = 20012002199970.

The previous prime is 20012002199963. The next prime is 20012002200023. The reversal of 20012002199971 is 17999120021002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20012002199971 - 2³ = 20012002199963 is a prime.

It is not a weakly prime, because it can be changed into another prime (20012002199941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006001099985 + 10006001099986.

It is an arithmetic number, because the mean of its divisors is an integer number (10006001099986).

Almost surely, 2^{20012002199971} is an apocalyptic number.

20012002199971 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012002199971 is an equidigital number, since it uses as much as digits as its factorization.

20012002199971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 43.

The spelling of 20012002199971 in words is "twenty trillion, twelve billion, two million, one hundred ninety-nine thousand, nine hundred seventy-one".