20021010012001 has 8 divisors (see below), whose sum is σ = 20220578308008. Its totient is φ = 19821468000000.

The previous prime is 20021010011983. The next prime is 20021010012041. The reversal of 20021010012001 is 10021001012002.

It can be written as a sum of positive squares in 4 ways, for example, as 8703538430976 + 11317471581025 = 2950176^2 + 3364145^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20021010012001 - 2²¹ = 20021007914849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021010012041) 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, 5038200 + ... + 8088601.

It is an arithmetic number, because the mean of its divisors is an integer number (2527572288501).

Almost surely, 2^{20021010012001} is an apocalyptic number.

It is an amenable number.

20021010012001 is a deficient number, since it is larger than the sum of its proper divisors (199568296007).

20021010012001 is a wasteful number, since it uses less digits than its factorization.

20021010012001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13142003.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20021010012001 its reverse (10021001012002), we get a palindrome (30042011024003).

The spelling of 20021010012001 in words is "twenty trillion, twenty-one billion, ten million, twelve thousand, one".