201210120200106 has 20 divisors (see below), whose sum is σ = 450859713782082. Its totient is φ = 67070040066648.

The previous prime is 201210120200069. The next prime is 201210120200107. The reversal of 201210120200106 is 601002021012102.

It can be written as a sum of positive squares in only one way, i.e., 113246523810225 + 87963596389881 = 10641735^2 + 9378891^2 .

It is a super-2 number, since 2×201210120200106² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (201210120200107) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 621018889345 + ... + 621018889668.

Almost surely, 2^{201210120200106} is an apocalyptic number.

201210120200106 is an abundant number, since it is smaller than the sum of its proper divisors (249649593581976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201210120200106 is a wasteful number, since it uses less digits than its factorization.

201210120200106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242037779027 (or 1242037779018 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 201210120200106 its reverse (601002021012102), we get a palindrome (802212141212208).

The spelling of 201210120200106 in words is "two hundred one trillion, two hundred ten billion, one hundred twenty million, two hundred thousand, one hundred six".