2221212011 has 2 divisors, whose sum is σ = 2221212012. Its totient is φ = 2221212010.

The previous prime is 2221211977. The next prime is 2221212013. The reversal of 2221212011 is 1102121222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2221212011 - 2³⁰ = 1147470187 is a prime.

Together with 2221212013, 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 (2221212013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110606005 + 1110606006.

It is an arithmetic number, because the mean of its divisors is an integer number (1110606006).

Almost surely, 2^2221212011 is an apocalyptic number.

2221212011 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221212011 is an equidigital number, since it uses as much as digits as its factorization.

2221212011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2221212011 is about 47129.7359530053. The cubic root of 2221212011 is about 1304.7581082566.

Adding to 2221212011 its reverse (1102121222), we get a palindrome (3323333233).

The spelling of 2221212011 in words is "two billion, two hundred twenty-one million, two hundred twelve thousand, eleven".