221213232011 has 2 divisors, whose sum is σ = 221213232012. Its totient is φ = 221213232010.

The previous prime is 221213231971. The next prime is 221213232013. The reversal of 221213232011 is 110232312122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221213232011 - 2¹⁴ = 221213215627 is a prime.

Together with 221213232013, 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 (221213232013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110606616005 + 110606616006.

It is an arithmetic number, because the mean of its divisors is an integer number (110606616006).

Almost surely, 2^221213232011 is an apocalyptic number.

221213232011 is a deficient number, since it is larger than the sum of its proper divisors (1).

221213232011 is an equidigital number, since it uses as much as digits as its factorization.

221213232011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 221213232011 its reverse (110232312122), we get a palindrome (331445544133).

The spelling of 221213232011 in words is "two hundred twenty-one billion, two hundred thirteen million, two hundred thirty-two thousand, eleven".