2012200101991 has 2 divisors, whose sum is σ = 2012200101992. Its totient is φ = 2012200101990.

The previous prime is 2012200101973. The next prime is 2012200102027. The reversal of 2012200101991 is 1991010022102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2012200101991 - 2⁹ = 2012200101479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2012200101941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006100050995 + 1006100050996.

It is an arithmetic number, because the mean of its divisors is an integer number (1006100050996).

Almost surely, 2^{2012200101991} is an apocalyptic number.

2012200101991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012200101991 is an equidigital number, since it uses as much as digits as its factorization.

2012200101991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 2012200101991 in words is "two trillion, twelve billion, two hundred million, one hundred one thousand, nine hundred ninety-one".