200121011999 has 2 divisors, whose sum is σ = 200121012000. Its totient is φ = 200121011998.

The previous prime is 200121011957. The next prime is 200121012011. The reversal of 200121011999 is 999110121002.

200121011999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 200121011999 - 2¹⁶ = 200120946463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200121011929) 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, 100060505999 + 100060506000.

It is an arithmetic number, because the mean of its divisors is an integer number (100060506000).

Almost surely, 2^200121011999 is an apocalyptic number.

200121011999 is a deficient number, since it is larger than the sum of its proper divisors (1).

200121011999 is an equidigital number, since it uses as much as digits as its factorization.

200121011999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 35.

The spelling of 200121011999 in words is "two hundred billion, one hundred twenty-one million, eleven thousand, nine hundred ninety-nine".