212101106210105 has 16 divisors (see below), whose sum is σ = 290901264011904. Its totient is φ = 145430885082240.

The previous prime is 212101106210033. The next prime is 212101106210129. The reversal of 212101106210105 is 501012601101212.

It is a happy number.

212101106210105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212101106210105 - 2¹⁸ = 212101105947961 is a prime.

It is a super-2 number, since 2×212101106210105² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205174172 + ... + 206205341.

It is an arithmetic number, because the mean of its divisors is an integer number (18181329000744).

Almost surely, 2^{212101106210105} is an apocalyptic number.

It is an amenable number.

212101106210105 is a deficient number, since it is larger than the sum of its proper divisors (78800157801799).

212101106210105 is a wasteful number, since it uses less digits than its factorization.

212101106210105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411394256.

The product of its (nonzero) digits is 240, while the sum is 23.

Adding to 212101106210105 its reverse (501012601101212), we get a palindrome (713113707311317).

The spelling of 212101106210105 in words is "two hundred twelve trillion, one hundred one billion, one hundred six million, two hundred ten thousand, one hundred five".