211422210985 has 16 divisors (see below), whose sum is σ = 258935851152. Its totient is φ = 165674649600.

The previous prime is 211422210973. The next prime is 211422211003. The reversal of 211422210985 is 589012224112.

It can be written as a sum of positive squares in 8 ways, for example, as 25339545856 + 186082665129 = 159184^2 + 431373^2 .

It is not a de Polignac number, because 211422210985 - 2¹⁵ = 211422178217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1364644 + ... + 1511653.

It is an arithmetic number, because the mean of its divisors is an integer number (16183490697).

Almost surely, 2^211422210985 is an apocalyptic number.

It is an amenable number.

211422210985 is a deficient number, since it is larger than the sum of its proper divisors (47513640167).

211422210985 is a wasteful number, since it uses less digits than its factorization.

211422210985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2876604.

The product of its (nonzero) digits is 23040, while the sum is 37.

The spelling of 211422210985 in words is "two hundred eleven billion, four hundred twenty-two million, two hundred ten thousand, nine hundred eighty-five".