2012020999991 has 2 divisors, whose sum is σ = 2012020999992. Its totient is φ = 2012020999990.

The previous prime is 2012020999969. The next prime is 2012021000047. The reversal of 2012020999991 is 1999990202102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2012020999991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2012020999291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006010499995 + 1006010499996.

It is an arithmetic number, because the mean of its divisors is an integer number (1006010499996).

Almost surely, 2^{2012020999991} is an apocalyptic number.

2012020999991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012020999991 is an equidigital number, since it uses as much as digits as its factorization.

2012020999991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 472392, while the sum is 53.

The spelling of 2012020999991 in words is "two trillion, twelve billion, twenty million, nine hundred ninety-nine thousand, nine hundred ninety-one".