213112012005 has 12 divisors (see below), whose sum is σ = 369394154220. Its totient is φ = 113659739712.

The previous prime is 213112011989. The next prime is 213112012067. The reversal of 213112012005 is 500210211312.

It can be written as a sum of positive squares in 2 ways, for example, as 137824335009 + 75287676996 = 371247^2 + 274386^2 .

It is not a de Polignac number, because 213112012005 - 2⁴ = 213112011989 is a prime.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 2367911200 + ... + 2367911289.

It is an arithmetic number, because the mean of its divisors is an integer number (30782846185).

Almost surely, 2^213112012005 is an apocalyptic number.

It is an amenable number.

213112012005 is a deficient number, since it is larger than the sum of its proper divisors (156282142215).

213112012005 is a wasteful number, since it uses less digits than its factorization.

213112012005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4735822500 (or 4735822497 counting only the distinct ones).

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

Adding to 213112012005 its reverse (500210211312), we get a palindrome (713322223317).

The spelling of 213112012005 in words is "two hundred thirteen billion, one hundred twelve million, twelve thousand, five".