210221011999 has 8 divisors (see below), whose sum is σ = 211698601920. Its totient is φ = 208748340096.

The previous prime is 210221011951. The next prime is 210221012063. The reversal of 210221011999 is 999110122012.

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 210221011999 - 2¹⁷ = 210220880927 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 (210221011939) 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 in 7 ways as a sum of consecutive naturals, for example, 1143694 + ... + 1314715.

It is an arithmetic number, because the mean of its divisors is an integer number (26462325240).

Almost surely, 2^210221011999 is an apocalyptic number.

210221011999 is a deficient number, since it is larger than the sum of its proper divisors (1477589921).

210221011999 is a wasteful number, since it uses less digits than its factorization.

210221011999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2459009.

The product of its (nonzero) digits is 5832, while the sum is 37.

The spelling of 210221011999 in words is "two hundred ten billion, two hundred twenty-one million, eleven thousand, nine hundred ninety-nine".