212201111205 has 20 divisors (see below), whose sum is σ = 380390140812. Its totient is φ = 113173925760.

The previous prime is 212201111191. The next prime is 212201111249. The reversal of 212201111205 is 502111102212.

It can be written as a sum of positive squares in 2 ways, for example, as 73377057924 + 138824053281 = 270882^2 + 372591^2 .

It is not a de Polignac number, because 212201111205 - 2⁷ = 212201111077 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 261976276 + ... + 261977085.

Almost surely, 2^212201111205 is an apocalyptic number.

It is an amenable number.

212201111205 is a deficient number, since it is larger than the sum of its proper divisors (168189029607).

212201111205 is an equidigital number, since it uses as much as digits as its factorization.

212201111205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523953378 (or 523953369 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

Adding to 212201111205 its reverse (502111102212), we get a palindrome (714312213417).

The spelling of 212201111205 in words is "two hundred twelve billion, two hundred one million, one hundred eleven thousand, two hundred five".