212031030105 has 32 divisors (see below), whose sum is σ = 376964737920. Its totient is φ = 113077010880.

The previous prime is 212031030091. The next prime is 212031030121. The reversal of 212031030105 is 501030130212.

It is not a de Polignac number, because 212031030105 - 2⁸ = 212031029849 is a prime.

It is a super-2 number, since 2×212031030105² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3503079 + ... + 3563091.

It is an arithmetic number, because the mean of its divisors is an integer number (11780148060).

Almost surely, 2^212031030105 is an apocalyptic number.

It is an amenable number.

212031030105 is a deficient number, since it is larger than the sum of its proper divisors (164933707815).

212031030105 is a wasteful number, since it uses less digits than its factorization.

212031030105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86198 (or 86192 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

Adding to 212031030105 its reverse (501030130212), we get a palindrome (713061160317).

The spelling of 212031030105 in words is "two hundred twelve billion, thirty-one million, thirty thousand, one hundred five".