210011212005 has 32 divisors (see below), whose sum is σ = 384063423744. Its totient is φ = 95994395136.

The previous prime is 210011211997. The next prime is 210011212007. The reversal of 210011212005 is 500212110012.

It is not a de Polignac number, because 210011212005 - 2³ = 210011211997 is a prime.

It is a super-2 number, since 2×210011212005² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210011212007) 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, 873279 + ... + 1087491.

It is an arithmetic number, because the mean of its divisors is an integer number (12001981992).

Almost surely, 2^210011212005 is an apocalyptic number.

It is an amenable number.

210011212005 is a deficient number, since it is larger than the sum of its proper divisors (174052211739).

210011212005 is a wasteful number, since it uses less digits than its factorization.

210011212005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223565.

The product of its (nonzero) digits is 40, while the sum is 15.

Adding to 210011212005 its reverse (500212110012), we get a palindrome (710223322017).

The spelling of 210011212005 in words is "two hundred ten billion, eleven million, two hundred twelve thousand, five".