20201001220001 has 16 divisors (see below), whose sum is σ = 23221194618240. Its totient is φ = 17214436504320.

The previous prime is 20201001219979. The next prime is 20201001220063. The reversal of 20201001220001 is 10002210010202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20201001220001 - 2¹⁰ = 20201001218977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20201001520001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3575591 + ... + 7292931.

It is an arithmetic number, because the mean of its divisors is an integer number (1451324663640).

Almost surely, 2^{20201001220001} is an apocalyptic number.

It is an amenable number.

20201001220001 is a deficient number, since it is larger than the sum of its proper divisors (3020193398239).

20201001220001 is a wasteful number, since it uses less digits than its factorization.

20201001220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3721864.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20201001220001 its reverse (10002210010202), we get a palindrome (30203211230203).

The spelling of 20201001220001 in words is "twenty trillion, two hundred one billion, one million, two hundred twenty thousand, one".