221311242344 has 24 divisors (see below), whose sum is σ = 433784685810. Its totient is φ = 105844505184.

The previous prime is 221311242343. The next prime is 221311242377. The reversal of 221311242344 is 443242113122.

It can be written as a sum of positive squares in only one way, i.e., 221229122500 + 82119844 = 470350^2 + 9062^2 .

It is a super-2 number, since 2×221311242344² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221311242343) 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 in 5 ways as a sum of consecutive naturals, for example, 26143127 + ... + 26151590.

Almost surely, 2^221311242344 is an apocalyptic number.

It is an amenable number.

221311242344 is a deficient number, since it is larger than the sum of its proper divisors (212473443466).

221311242344 is a wasteful number, since it uses less digits than its factorization.

221311242344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52294769 (or 52294742 counting only the distinct ones).

The product of its digits is 9216, while the sum is 29.

Adding to 221311242344 its reverse (443242113122), we get a palindrome (664553355466).

The spelling of 221311242344 in words is "two hundred twenty-one billion, three hundred eleven million, two hundred forty-two thousand, three hundred forty-four".