2020131009991 has 2 divisors, whose sum is σ = 2020131009992. Its totient is φ = 2020131009990.

The previous prime is 2020131009931. The next prime is 2020131010013. The reversal of 2020131009991 is 1999001310202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2020131009991 - 2¹³ = 2020131001799 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2020131009991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2020131009931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010065504995 + 1010065504996.

It is an arithmetic number, because the mean of its divisors is an integer number (1010065504996).

Almost surely, 2^{2020131009991} is an apocalyptic number.

2020131009991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020131009991 is an equidigital number, since it uses as much as digits as its factorization.

2020131009991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 37.

The spelling of 2020131009991 in words is "two trillion, twenty billion, one hundred thirty-one million, nine thousand, nine hundred ninety-one".