212011013205 has 48 divisors (see below), whose sum is σ = 368581649904. Its totient is φ = 112735687680.

The previous prime is 212011013143. The next prime is 212011013219. The reversal of 212011013205 is 502310110212.

It can be written as a sum of positive squares in 8 ways, for example, as 6309760356 + 205701252849 = 79434^2 + 453543^2 .

It is not a de Polignac number, because 212011013205 - 2¹² = 212011009109 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 47 ways as a sum of consecutive naturals, for example, 54123907 + ... + 54127823.

It is an arithmetic number, because the mean of its divisors is an integer number (7678784373).

Almost surely, 2^212011013205 is an apocalyptic number.

It is an amenable number.

212011013205 is a deficient number, since it is larger than the sum of its proper divisors (156570636699).

212011013205 is a wasteful number, since it uses less digits than its factorization.

212011013205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7206 (or 7203 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 212011013205 its reverse (502310110212), we get a palindrome (714321123417).

The spelling of 212011013205 in words is "two hundred twelve billion, eleven million, thirteen thousand, two hundred five".