20110211122011 has 4 divisors (see below), whose sum is σ = 26813614829352. Its totient is φ = 13406807414672.

The previous prime is 20110211121989. The next prime is 20110211122019. The reversal of 20110211122011 is 11022111201102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20110211122011 - 2¹¹ = 20110211119963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20110211122019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3351701853666 + ... + 3351701853671.

It is an arithmetic number, because the mean of its divisors is an integer number (6703403707338).

Almost surely, 2^{20110211122011} is an apocalyptic number.

20110211122011 is a deficient number, since it is larger than the sum of its proper divisors (6703403707341).

20110211122011 is an equidigital number, since it uses as much as digits as its factorization.

20110211122011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6703403707340.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20110211122011 its reverse (11022111201102), we get a palindrome (31132322323113).

The spelling of 20110211122011 in words is "twenty trillion, one hundred ten billion, two hundred eleven million, one hundred twenty-two thousand, eleven".