20020001010001 has 4 divisors (see below), whose sum is σ = 20508293717604. Its totient is φ = 19531708302400.

The previous prime is 20020001009999. The next prime is 20020001010011. The reversal of 20020001010001 is 10001010002002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4699352504401 + 15320648505600 = 2167799^2 + 3914160^2 .

It is a cyclic number.

It is not a de Polignac number, because 20020001010001 - 2¹ = 20020001009999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20020001010011) 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, 244146353740 + ... + 244146353821.

It is an arithmetic number, because the mean of its divisors is an integer number (5127073429401).

Almost surely, 2^{20020001010001} is an apocalyptic number.

It is an amenable number.

20020001010001 is a deficient number, since it is larger than the sum of its proper divisors (488292707603).

20020001010001 is an equidigital number, since it uses as much as digits as its factorization.

20020001010001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488292707602.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 20020001010001 its reverse (10001010002002), we get a palindrome (30021011012003).

The spelling of 20020001010001 in words is "twenty trillion, twenty billion, one million, ten thousand, one".