221210222011 has 2 divisors, whose sum is σ = 221210222012. Its totient is φ = 221210222010.

The previous prime is 221210221993. The next prime is 221210222021. The reversal of 221210222011 is 110222012122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221210222011 - 2¹¹ = 221210219963 is a prime.

It is not a weakly prime, because it can be changed into another prime (221210222021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605111005 + 110605111006.

It is an arithmetic number, because the mean of its divisors is an integer number (110605111006).

Almost surely, 2^221210222011 is an apocalyptic number.

221210222011 is a deficient number, since it is larger than the sum of its proper divisors (1).

221210222011 is an equidigital number, since it uses as much as digits as its factorization.

221210222011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221210222011 its reverse (110222012122), we get a palindrome (331432234133).

The spelling of 221210222011 in words is "two hundred twenty-one billion, two hundred ten million, two hundred twenty-two thousand, eleven".