20211100021111 has 8 divisors (see below), whose sum is σ = 20339710976000. Its totient is φ = 20082759543000.

The previous prime is 20211100021081. The next prime is 20211100021127. The reversal of 20211100021111 is 11112000111202.

It is a happy number.

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 20211100021111 - 2²³ = 20211091632503 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20211100021091 and 20211100021100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211100021171) 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, 67469271 + ... + 67768168.

It is an arithmetic number, because the mean of its divisors is an integer number (2542463872000).

Almost surely, 2^{20211100021111} is an apocalyptic number.

20211100021111 is a deficient number, since it is larger than the sum of its proper divisors (128610954889).

20211100021111 is a wasteful number, since it uses less digits than its factorization.

20211100021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135238389.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20211100021111 its reverse (11112000111202), we get a palindrome (31323100132313).

Subtracting from 20211100021111 its reverse (11112000111202), we obtain a palindrome (9099099909909).

The spelling of 20211100021111 in words is "twenty trillion, two hundred eleven billion, one hundred million, twenty-one thousand, one hundred eleven".