20000021112001 has 4 divisors (see below), whose sum is σ = 22857166985152. Its totient is φ = 17142875238852.

The previous prime is 20000021111981. The next prime is 20000021112007. The reversal of 20000021112001 is 10021112000002.

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 a cyclic number.

It is not a de Polignac number, because 20000021112001 - 2²³ = 20000012723393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20000021112007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1428572936565 + ... + 1428572936578.

It is an arithmetic number, because the mean of its divisors is an integer number (5714291746288).

Almost surely, 2^{20000021112001} is an apocalyptic number.

It is an amenable number.

20000021112001 is a deficient number, since it is larger than the sum of its proper divisors (2857145873151).

20000021112001 is an equidigital number, since it uses as much as digits as its factorization.

20000021112001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2857145873150.

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

Adding to 20000021112001 its reverse (10021112000002), we get a palindrome (30021133112003).

The spelling of 20000021112001 in words is "twenty trillion, twenty-one million, one hundred twelve thousand, one".