211000201221001 has 4 divisors (see below), whose sum is σ = 211000305002004. Its totient is φ = 211000097440000.

The previous prime is 211000201220917. The next prime is 211000201221013. The reversal of 211000201221001 is 100122102000112.

211000201221001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 207543208449600 + 3456992771401 = 14406360^2 + 1859299^2 .

It is a cyclic number.

It is not a de Polignac number, because 211000201221001 - 2²¹ = 211000199123849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211000211221001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48778600 + ... + 52927801.

It is an arithmetic number, because the mean of its divisors is an integer number (52750076250501).

Almost surely, 2^{211000201221001} is an apocalyptic number.

It is an amenable number.

211000201221001 is a deficient number, since it is larger than the sum of its proper divisors (103781003).

211000201221001 is a wasteful number, since it uses less digits than its factorization.

211000201221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103781002.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 211000201221001 its reverse (100122102000112), we get a palindrome (311122303221113).

The spelling of 211000201221001 in words is "two hundred eleven trillion, two hundred one million, two hundred twenty-one thousand, one".