211210212005 has 32 divisors (see below), whose sum is σ = 275654752128. Its totient is φ = 154425888000.

The previous prime is 211210211999. The next prime is 211210212007. The reversal of 211210212005 is 500212012112.

It is not a de Polignac number, because 211210212005 - 2¹⁴ = 211210195621 is a prime.

It is a super-2 number, since 2×211210212005² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211210212007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13978955 + ... + 13994055.

It is an arithmetic number, because the mean of its divisors is an integer number (8614211004).

Almost surely, 2^211210212005 is an apocalyptic number.

It is an amenable number.

211210212005 is a deficient number, since it is larger than the sum of its proper divisors (64444540123).

211210212005 is a wasteful number, since it uses less digits than its factorization.

211210212005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17237.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 211210212005 its reverse (500212012112), we get a palindrome (711422224117).

The spelling of 211210212005 in words is "two hundred eleven billion, two hundred ten million, two hundred twelve thousand, five".