201201110100 has 54 divisors (see below), whose sum is σ = 630653704590. Its totient is φ = 53653629120.

The previous prime is 201201110057. The next prime is 201201110107. The reversal of 201201110100 is 1011102102.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 69436466064 + 131764644036 = 263508^2 + 362994^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201201110107) 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 17 ways as a sum of consecutive naturals, for example, 111777495 + ... + 111779294.

Almost surely, 2^201201110100 is an apocalyptic number.

201201110100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201201110100 is an abundant number, since it is smaller than the sum of its proper divisors (429452594490).

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

201201110100 is a wasteful number, since it uses less digits than its factorization.

201201110100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223556809 (or 223556799 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 201201110100 its reverse (1011102102), we get a palindrome (202212212202).

The spelling of 201201110100 in words is "two hundred one billion, two hundred one million, one hundred ten thousand, one hundred".