200120210001 has 6 divisors (see below), whose sum is σ = 289062525570. Its totient is φ = 133413473328.

The previous prime is 200120209987. The next prime is 200120210009. The reversal of 200120210001 is 100012021002.

It can be written as a sum of positive squares in only one way, i.e., 135515279376 + 64604930625 = 368124^2 + 254175^2 .

It is not a de Polignac number, because 200120210001 - 2⁹ = 200120209489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 22235578889 = 200120210001 / (2 + 0 + 0 + 1 + 2 + 0 + 2 + 1 + 0 + 0 + 0 + 1).

It is not an unprimeable number, because it can be changed into a prime (200120210009) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11117789436 + ... + 11117789453.

It is an arithmetic number, because the mean of its divisors is an integer number (48177087595).

Almost surely, 2^200120210001 is an apocalyptic number.

It is an amenable number.

200120210001 is a deficient number, since it is larger than the sum of its proper divisors (88942315569).

200120210001 is a wasteful number, since it uses less digits than its factorization.

200120210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22235578895 (or 22235578892 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 200120210001 its reverse (100012021002), we get a palindrome (300132231003).

The spelling of 200120210001 in words is "two hundred billion, one hundred twenty million, two hundred ten thousand, one".