22122222011 has 2 divisors, whose sum is σ = 22122222012. Its totient is φ = 22122222010.

The previous prime is 22122222007. The next prime is 22122222013. The reversal of 22122222011 is 11022222122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22122222011 - 2² = 22122222007 is a prime.

Together with 22122222013, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22122222013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11061111005 + 11061111006.

It is an arithmetic number, because the mean of its divisors is an integer number (11061111006).

Almost surely, 2^22122222011 is an apocalyptic number.

22122222011 is a deficient number, since it is larger than the sum of its proper divisors (1).

22122222011 is an equidigital number, since it uses as much as digits as its factorization.

22122222011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22122222011 its reverse (11022222122), we get a palindrome (33144444133).

The spelling of 22122222011 in words is "twenty-two billion, one hundred twenty-two million, two hundred twenty-two thousand, eleven".