2020001020991 has 2 divisors, whose sum is σ = 2020001020992. Its totient is φ = 2020001020990.

The previous prime is 2020001020957. The next prime is 2020001021023. The reversal of 2020001020991 is 1990201000202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2020001020991 - 2³⁰ = 2018927279167 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 2020001020991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2020001020931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010000510495 + 1010000510496.

It is an arithmetic number, because the mean of its divisors is an integer number (1010000510496).

Almost surely, 2^{2020001020991} is an apocalyptic number.

2020001020991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020001020991 is an equidigital number, since it uses as much as digits as its factorization.

2020001020991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 2020001020991 in words is "two trillion, twenty billion, one million, twenty thousand, nine hundred ninety-one".