200201102001 has 18 divisors (see below), whose sum is σ = 293309750370. Its totient is φ = 131587548960.

The previous prime is 200201101981. The next prime is 200201102011. The reversal of 200201102001 is 100201102002.

It can be written as a sum of positive squares in only one way, i.e., 138625160976 + 61575941025 = 372324^2 + 248145^2 .

It is not a de Polignac number, because 200201102001 - 2¹¹ = 200201099953 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (200201102011) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2160996 + ... + 2251733.

Almost surely, 2^200201102001 is an apocalyptic number.

It is an amenable number.

200201102001 is a deficient number, since it is larger than the sum of its proper divisors (93108648369).

200201102001 is an equidigital number, since it uses as much as digits as its factorization.

200201102001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4412877 (or 4412803 counting only the distinct ones).

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

Adding to 200201102001 its reverse (100201102002), we get a palindrome (300402204003).

Subtracting from 200201102001 its reverse (100201102002), we obtain a palindrome (99999999999).

The spelling of 200201102001 in words is "two hundred billion, two hundred one million, one hundred two thousand, one".