221211200011 has 2 divisors, whose sum is σ = 221211200012. Its totient is φ = 221211200010.

The previous prime is 221211200009. The next prime is 221211200029. The reversal of 221211200011 is 110002112122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221211200011 - 2¹ = 221211200009 is a prime.

Together with 221211200009, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 221211199964 and 221211200000.

It is not a weakly prime, because it can be changed into another prime (221211200081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605600005 + 110605600006.

It is an arithmetic number, because the mean of its divisors is an integer number (110605600006).

Almost surely, 2^221211200011 is an apocalyptic number.

221211200011 is a deficient number, since it is larger than the sum of its proper divisors (1).

221211200011 is an equidigital number, since it uses as much as digits as its factorization.

221211200011 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 13.

Adding to 221211200011 its reverse (110002112122), we get a palindrome (331213312133).

The spelling of 221211200011 in words is "two hundred twenty-one billion, two hundred eleven million, two hundred thousand, eleven".