20001111120211 has 8 divisors (see below), whose sum is σ = 21546279650000. Its totient is φ = 18456888521952.

The previous prime is 20001111120197. The next prime is 20001111120227. The reversal of 20001111120211 is 11202111110002.

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 20001111120211 - 2⁹ = 20001111119699 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20001111120191 and 20001111120200.

It is not an unprimeable number, because it can be changed into a prime (20001111120281) 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, 236438961 + ... + 236523538.

It is an arithmetic number, because the mean of its divisors is an integer number (2693284956250).

Almost surely, 2^{20001111120211} is an apocalyptic number.

20001111120211 is a deficient number, since it is larger than the sum of its proper divisors (1545168529789).

20001111120211 is a wasteful number, since it uses less digits than its factorization.

20001111120211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472965765.

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

Adding to 20001111120211 its reverse (11202111110002), we get a palindrome (31203222230213).

The spelling of 20001111120211 in words is "twenty trillion, one billion, one hundred eleven million, one hundred twenty thousand, two hundred eleven".