20001122210911 has 2 divisors, whose sum is σ = 20001122210912. Its totient is φ = 20001122210910.

The previous prime is 20001122210903. The next prime is 20001122211041. The reversal of 20001122210911 is 11901222110002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20001122210911 - 2³ = 20001122210903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001123210911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000561105455 + 10000561105456.

It is an arithmetic number, because the mean of its divisors is an integer number (10000561105456).

Almost surely, 2^{20001122210911} is an apocalyptic number.

20001122210911 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001122210911 is an equidigital number, since it uses as much as digits as its factorization.

20001122210911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 20001122210911 its reverse (11901222110002), we get a palindrome (31902344320913).

The spelling of 20001122210911 in words is "twenty trillion, one billion, one hundred twenty-two million, two hundred ten thousand, nine hundred eleven".