20112212011 has 2 divisors, whose sum is σ = 20112212012. Its totient is φ = 20112212010.

The previous prime is 20112212009. The next prime is 20112212017. The reversal of 20112212011 is 11021221102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20112212011 - 2¹ = 20112212009 is a prime.

Together with 20112212009, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 20112211982 and 20112212000.

It is not a weakly prime, because it can be changed into another prime (20112212017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056106005 + 10056106006.

It is an arithmetic number, because the mean of its divisors is an integer number (10056106006).

Almost surely, 2^20112212011 is an apocalyptic number.

20112212011 is a deficient number, since it is larger than the sum of its proper divisors (1).

20112212011 is an equidigital number, since it uses as much as digits as its factorization.

20112212011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20112212011 its reverse (11021221102), we get a palindrome (31133433113).

Subtracting from 20112212011 its reverse (11021221102), we obtain a palindrome (9090990909).

The spelling of 20112212011 in words is "twenty billion, one hundred twelve million, two hundred twelve thousand, eleven".