211204122215 has 16 divisors (see below), whose sum is σ = 272901843360. Its totient is φ = 156328949760.

The previous prime is 211204122191. The next prime is 211204122221. The reversal of 211204122215 is 512221402112.

It is not a de Polignac number, because 211204122215 - 2³⁰ = 210130380391 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21052226 + ... + 21062255.

It is an arithmetic number, because the mean of its divisors is an integer number (17056365210).

Almost surely, 2^211204122215 is an apocalyptic number.

211204122215 is a deficient number, since it is larger than the sum of its proper divisors (61697721145).

211204122215 is a wasteful number, since it uses less digits than its factorization.

211204122215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42114562.

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 211204122215 its reverse (512221402112), we get a palindrome (723425524327).

The spelling of 211204122215 in words is "two hundred eleven billion, two hundred four million, one hundred twenty-two thousand, two hundred fifteen".