212011121999 has 2 divisors, whose sum is σ = 212011122000. Its totient is φ = 212011121998.

The previous prime is 212011121989. The next prime is 212011122013. The reversal of 212011121999 is 999121110212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212011121999 - 2¹⁶ = 212011056463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212011121909) 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, 106005560999 + 106005561000.

It is an arithmetic number, because the mean of its divisors is an integer number (106005561000).

Almost surely, 2^212011121999 is an apocalyptic number.

212011121999 is a deficient number, since it is larger than the sum of its proper divisors (1).

212011121999 is an equidigital number, since it uses as much as digits as its factorization.

212011121999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 38.

The spelling of 212011121999 in words is "two hundred twelve billion, eleven million, one hundred twenty-one thousand, nine hundred ninety-nine".