2001220201 has 8 divisors (see below), whose sum is σ = 2107814400. Its totient is φ = 1894752720.

The previous prime is 2001220181. The next prime is 2001220211. The reversal of 2001220201 is 1020221002.

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-2001220201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2001220211) 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, 1656 + ... + 63286.

It is an arithmetic number, because the mean of its divisors is an integer number (263476800).

Almost surely, 2^2001220201 is an apocalyptic number.

It is an amenable number.

2001220201 is a deficient number, since it is larger than the sum of its proper divisors (106594199).

2001220201 is a wasteful number, since it uses less digits than its factorization.

2001220201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63359.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 2001220201 is about 44734.9997317537. Note that the first 3 decimals coincide. The cubic root of 2001220201 is about 1260.1772239588.

Adding to 2001220201 its reverse (1020221002), we get a palindrome (3021441203).

The spelling of 2001220201 in words is "two billion, one million, two hundred twenty thousand, two hundred one".