2020200021971 has 2 divisors, whose sum is σ = 2020200021972. Its totient is φ = 2020200021970.

The previous prime is 2020200021943. The next prime is 2020200021997. The reversal of 2020200021971 is 1791200020202.

It is an a-pointer prime, because the next prime (2020200021997) can be obtained adding 2020200021971 to its sum of digits (26).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2020200021971 - 2¹⁸ = 2020199759827 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2020200021971.

It is not a weakly prime, because it can be changed into another prime (2020200021071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010100010985 + 1010100010986.

It is an arithmetic number, because the mean of its divisors is an integer number (1010100010986).

Almost surely, 2^{2020200021971} is an apocalyptic number.

2020200021971 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020200021971 is an equidigital number, since it uses as much as digits as its factorization.

2020200021971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 26.

The spelling of 2020200021971 in words is "two trillion, twenty billion, two hundred million, twenty-one thousand, nine hundred seventy-one".