201220020001 has 32 divisors (see below), whose sum is σ = 270830649600. Its totient is φ = 144379514880.

The previous prime is 201220019951. The next prime is 201220020013. The reversal of 201220020001 is 100020022102.

It is a cyclic number.

It is not a de Polignac number, because 201220020001 - 2¹¹ = 201220017953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201220020001.

It is not an unprimeable number, because it can be changed into a prime (201220020041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 163665 + ... + 655153.

It is an arithmetic number, because the mean of its divisors is an integer number (8463457800).

Almost surely, 2^201220020001 is an apocalyptic number.

It is an amenable number.

201220020001 is a deficient number, since it is larger than the sum of its proper divisors (69610629599).

201220020001 is a wasteful number, since it uses less digits than its factorization.

201220020001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491929.

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

Adding to 201220020001 its reverse (100020022102), we get a palindrome (301240042103).

The spelling of 201220020001 in words is "two hundred one billion, two hundred twenty million, twenty thousand, one".