20111244311 has 2 divisors, whose sum is σ = 20111244312. Its totient is φ = 20111244310.

The previous prime is 20111244289. The next prime is 20111244313. The reversal of 20111244311 is 11344211102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20111244311 - 2⁶ = 20111244247 is a prime.

Together with 20111244313, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20111244313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055622155 + 10055622156.

It is an arithmetic number, because the mean of its divisors is an integer number (10055622156).

Almost surely, 2^20111244311 is an apocalyptic number.

20111244311 is a deficient number, since it is larger than the sum of its proper divisors (1).

20111244311 is an equidigital number, since it uses as much as digits as its factorization.

20111244311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 20111244311 its reverse (11344211102), we get a palindrome (31455455413).

The spelling of 20111244311 in words is "twenty billion, one hundred eleven million, two hundred forty-four thousand, three hundred eleven".