221240441311 has 2 divisors, whose sum is σ = 221240441312. Its totient is φ = 221240441310.

The previous prime is 221240441309. The next prime is 221240441327. The reversal of 221240441311 is 113144042122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221240441311 - 2¹ = 221240441309 is a prime.

Together with 221240441309, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221240411311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110620220655 + 110620220656.

It is an arithmetic number, because the mean of its divisors is an integer number (110620220656).

Almost surely, 2^221240441311 is an apocalyptic number.

221240441311 is a deficient number, since it is larger than the sum of its proper divisors (1).

221240441311 is an equidigital number, since it uses as much as digits as its factorization.

221240441311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 221240441311 its reverse (113144042122), we get a palindrome (334384483433).

The spelling of 221240441311 in words is "two hundred twenty-one billion, two hundred forty million, four hundred forty-one thousand, three hundred eleven".