221143344311 has 2 divisors, whose sum is σ = 221143344312. Its totient is φ = 221143344310.

The previous prime is 221143344307. The next prime is 221143344397. The reversal of 221143344311 is 113443341122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221143344311 - 2² = 221143344307 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221143344811) 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, 110571672155 + 110571672156.

It is an arithmetic number, because the mean of its divisors is an integer number (110571672156).

Almost surely, 2^221143344311 is an apocalyptic number.

221143344311 is a deficient number, since it is larger than the sum of its proper divisors (1).

221143344311 is an equidigital number, since it uses as much as digits as its factorization.

221143344311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 29.

Adding to 221143344311 its reverse (113443341122), we get a palindrome (334586685433).

The spelling of 221143344311 in words is "two hundred twenty-one billion, one hundred forty-three million, three hundred forty-four thousand, three hundred eleven".