210001201999 has 2 divisors, whose sum is σ = 210001202000. Its totient is φ = 210001201998.

The previous prime is 210001201981. The next prime is 210001202009. The reversal of 210001201999 is 999102100012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 210001201999 - 2⁵ = 210001201967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210001211999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105000600999 + 105000601000.

It is an arithmetic number, because the mean of its divisors is an integer number (105000601000).

Almost surely, 2^210001201999 is an apocalyptic number.

210001201999 is a deficient number, since it is larger than the sum of its proper divisors (1).

210001201999 is an equidigital number, since it uses as much as digits as its factorization.

210001201999 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 34.

The spelling of 210001201999 in words is "two hundred ten billion, one million, two hundred one thousand, nine hundred ninety-nine".