20011112021001 has 8 divisors (see below), whose sum is σ = 26682229110240. Its totient is φ = 13340368139552.

The previous prime is 20011112020969. The next prime is 20011112021039. The reversal of 20011112021001 is 10012021111002.

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 20011112021001 - 2⁵ = 20011112020969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20011112021051) 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, 93176811 + ... + 93391328.

It is an arithmetic number, because the mean of its divisors is an integer number (3335278638780).

Almost surely, 2^{20011112021001} is an apocalyptic number.

It is an amenable number.

20011112021001 is a deficient number, since it is larger than the sum of its proper divisors (6671117089239).

20011112021001 is a wasteful number, since it uses less digits than its factorization.

20011112021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186603895.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20011112021001 its reverse (10012021111002), we get a palindrome (30023133132003).

Subtracting from 20011112021001 its reverse (10012021111002), we obtain a palindrome (9999090909999).

The spelling of 20011112021001 in words is "twenty trillion, eleven billion, one hundred twelve million, twenty-one thousand, one".