22122011 has 2 divisors, whose sum is σ = 22122012. Its totient is φ = 22122010.

The previous prime is 22121987. The next prime is 22122013. The reversal of 22122011 is 11022122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22122011 is a prime.

Together with 22122013, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22121983 and 22122001.

It is not a weakly prime, because it can be changed into another prime (22122013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11061005 + 11061006.

It is an arithmetic number, because the mean of its divisors is an integer number (11061006).

Almost surely, 2^22122011 is an apocalyptic number.

22122011 is a deficient number, since it is larger than the sum of its proper divisors (1).

22122011 is an equidigital number, since it uses as much as digits as its factorization.

22122011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 22122011 is about 4703.4041927098. The cubic root of 22122011 is about 280.7209778301.

Adding to 22122011 its reverse (11022122), we get a palindrome (33144133).

The spelling of 22122011 in words is "twenty-two million, one hundred twenty-two thousand, eleven".