212102122201 has 4 divisors (see below), whose sum is σ = 213650313012. Its totient is φ = 210553931392.

The previous prime is 212102122187. The next prime is 212102122241. The reversal of 212102122201 is 102221201212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 172241600400 + 39860521801 = 415020^2 + 199651^2 .

It is a cyclic number.

It is not a de Polignac number, because 212102122201 - 2¹³ = 212102114009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212102122241) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 774095200 + ... + 774095473.

It is an arithmetic number, because the mean of its divisors is an integer number (53412578253).

Almost surely, 2^212102122201 is an apocalyptic number.

It is an amenable number.

212102122201 is a deficient number, since it is larger than the sum of its proper divisors (1548190811).

212102122201 is a wasteful number, since it uses less digits than its factorization.

212102122201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548190810.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212102122201 its reverse (102221201212), we get a palindrome (314323323413).

The spelling of 212102122201 in words is "two hundred twelve billion, one hundred two million, one hundred twenty-two thousand, two hundred one".