2011212121999 has 2 divisors, whose sum is σ = 2011212122000. Its totient is φ = 2011212121998.

The previous prime is 2011212121927. The next prime is 2011212122011. The reversal of 2011212121999 is 9991212121102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2011212121999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011212127999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005606060999 + 1005606061000.

It is an arithmetic number, because the mean of its divisors is an integer number (1005606061000).

Almost surely, 2^{2011212121999} is an apocalyptic number.

2011212121999 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011212121999 is an equidigital number, since it uses as much as digits as its factorization.

2011212121999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 40.

The spelling of 2011212121999 in words is "two trillion, eleven billion, two hundred twelve million, one hundred twenty-one thousand, nine hundred ninety-nine".