211220200001 has 8 divisors (see below), whose sum is σ = 211618500264. Its totient is φ = 210822151680.

The previous prime is 211220199997. The next prime is 211220200007. The reversal of 211220200001 is 100002022112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 49262246401 + 161957953600 = 221951^2 + 402440^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 211220200001 - 2² = 211220199997 is a prime.

It is a super-2 number, since 2×211220200001² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (211220200007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1659491 + ... + 1782231.

It is an arithmetic number, because the mean of its divisors is an integer number (26452312533).

Almost surely, 2^211220200001 is an apocalyptic number.

It is an amenable number.

211220200001 is a deficient number, since it is larger than the sum of its proper divisors (398300263).

211220200001 is a wasteful number, since it uses less digits than its factorization.

211220200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125971.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 211220200001 its reverse (100002022112), we get a palindrome (311222222113).

The spelling of 211220200001 in words is "two hundred eleven billion, two hundred twenty million, two hundred thousand, one".