211005220609 has 8 divisors (see below), whose sum is σ = 211534023680. Its totient is φ = 210476810016.

The previous prime is 211005220571. The next prime is 211005220633. The reversal of 211005220609 is 906022500112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211005220609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211005220669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 993637 + ... + 1187149.

It is an arithmetic number, because the mean of its divisors is an integer number (26441752960).

Almost surely, 2^211005220609 is an apocalyptic number.

It is an amenable number.

211005220609 is a deficient number, since it is larger than the sum of its proper divisors (528803071).

211005220609 is a wasteful number, since it uses less digits than its factorization.

211005220609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196239.

The product of its (nonzero) digits is 2160, while the sum is 28.

The spelling of 211005220609 in words is "two hundred eleven billion, five million, two hundred twenty thousand, six hundred nine".