210123071999 has 8 divisors (see below), whose sum is σ = 210938418432. Its totient is φ = 209309244120.

The previous prime is 210123071993. The next prime is 210123072011. The reversal of 210123071999 is 999170321012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 210123071999 - 2¹⁶ = 210123006463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210123071993) 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 in 7 ways as a sum of consecutive naturals, for example, 101969 + ... + 656234.

It is an arithmetic number, because the mean of its divisors is an integer number (26367302304).

Almost surely, 2^210123071999 is an apocalyptic number.

210123071999 is a deficient number, since it is larger than the sum of its proper divisors (815346433).

210123071999 is an equidigital number, since it uses as much as digits as its factorization.

210123071999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759277.

The product of its (nonzero) digits is 61236, while the sum is 44.

The spelling of 210123071999 in words is "two hundred ten billion, one hundred twenty-three million, seventy-one thousand, nine hundred ninety-nine".