20021112001 has 8 divisors (see below), whose sum is σ = 21842874144. Its totient is φ = 18199626720.

The previous prime is 20021111969. The next prime is 20021112053. The reversal of 20021112001 is 10021112002.

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

It is not a de Polignac number, because 20021112001 - 2⁵ = 20021111969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021112061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99990 + ... + 223696.

It is an arithmetic number, because the mean of its divisors is an integer number (2730359268).

Almost surely, 2^20021112001 is an apocalyptic number.

It is an amenable number.

20021112001 is a deficient number, since it is larger than the sum of its proper divisors (1821762143).

20021112001 is a wasteful number, since it uses less digits than its factorization.

20021112001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138431.

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

Adding to 20021112001 its reverse (10021112002), we get a palindrome (30042224003).

Subtracting from 20021112001 its reverse (10021112002), we obtain a palindrome (9999999999).

It can be divided in two parts, 200211 and 12001, that added together give a palindrome (212212).

The spelling of 20021112001 in words is "twenty billion, twenty-one million, one hundred twelve thousand, one".