20001220220201 has 8 divisors (see below), whose sum is σ = 21827573403744. Its totient is φ = 18176210442720.

The previous prime is 20001220220171. The next prime is 20001220220203. The reversal of 20001220220201 is 10202202210002.

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

It is a de Polignac number, because none of the positive numbers 2^k-20001220220201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001220220203) 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, 335820380 + ... + 335879933.

It is an arithmetic number, because the mean of its divisors is an integer number (2728446675468).

Almost surely, 2^{20001220220201} is an apocalyptic number.

It is an amenable number.

20001220220201 is a deficient number, since it is larger than the sum of its proper divisors (1826353183543).

20001220220201 is a wasteful number, since it uses less digits than its factorization.

20001220220201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671703031.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20001220220201 its reverse (10202202210002), we get a palindrome (30203422430203).

The spelling of 20001220220201 in words is "twenty trillion, one billion, two hundred twenty million, two hundred twenty thousand, two hundred one".