20201220010001 has 4 divisors (see below), whose sum is σ = 20201315671152. Its totient is φ = 20201124348852.

The previous prime is 20201220009983. The next prime is 20201220010019. The reversal of 20201220010001 is 10001002210202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (20201220009983) and next prime (20201220010019).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20201220010001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20201220010061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47513111 + ... + 47936396.

It is an arithmetic number, because the mean of its divisors is an integer number (5050328917788).

Almost surely, 2^{20201220010001} is an apocalyptic number.

It is an amenable number.

20201220010001 is a deficient number, since it is larger than the sum of its proper divisors (95661151).

20201220010001 is an equidigital number, since it uses as much as digits as its factorization.

20201220010001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95661150.

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

Adding to 20201220010001 its reverse (10001002210202), we get a palindrome (30202222220203).

The spelling of 20201220010001 in words is "twenty trillion, two hundred one billion, two hundred twenty million, ten thousand, one".