201210101 has 8 divisors (see below), whose sum is σ = 206320824. Its totient is φ = 196148160.

The previous prime is 201210073. The next prime is 201210103. The reversal of 201210101 is 101012102.

It can be written as a sum of positive squares in 4 ways, for example, as 50779876 + 150430225 = 7126^2 + 12265^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201210101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201210103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3770 + ... + 20411.

It is an arithmetic number, because the mean of its divisors is an integer number (25790103).

Almost surely, 2^201210101 is an apocalyptic number.

It is an amenable number.

201210101 is a deficient number, since it is larger than the sum of its proper divisors (5110723).

201210101 is a wasteful number, since it uses less digits than its factorization.

201210101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24391.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 201210101 is about 14184.8546344332. The cubic root of 201210101 is about 585.9806291088.

Adding to 201210101 its reverse (101012102), we get a palindrome (302222203).

It can be divided in two parts, 20 and 1210101, that added together give a palindrome (1210121).

The spelling of 201210101 in words is "two hundred one million, two hundred ten thousand, one hundred one".