221443041311 has 2 divisors, whose sum is σ = 221443041312. Its totient is φ = 221443041310.

The previous prime is 221443041293. The next prime is 221443041359. The reversal of 221443041311 is 113140344122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221443041311 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221443041511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110721520655 + 110721520656.

It is an arithmetic number, because the mean of its divisors is an integer number (110721520656).

Almost surely, 2^221443041311 is an apocalyptic number.

221443041311 is a deficient number, since it is larger than the sum of its proper divisors (1).

221443041311 is an equidigital number, since it uses as much as digits as its factorization.

221443041311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 221443041311 its reverse (113140344122), we get a palindrome (334583385433).

The spelling of 221443041311 in words is "two hundred twenty-one billion, four hundred forty-three million, forty-one thousand, three hundred eleven".