221143421434 has 8 divisors (see below), whose sum is σ = 357231680820. Its totient is φ = 102066194496.

The previous prime is 221143421407. The next prime is 221143421437. The reversal of 221143421434 is 434124341122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 214974104409 + 6169317025 = 463653^2 + 78545^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 221143421396 and 221143421405.

It is not an unprimeable number, because it can be changed into a prime (221143421437) 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 in 3 ways as a sum of consecutive naturals, for example, 4252758079 + ... + 4252758130.

Almost surely, 2^221143421434 is an apocalyptic number.

221143421434 is a deficient number, since it is larger than the sum of its proper divisors (136088259386).

221143421434 is a wasteful number, since it uses less digits than its factorization.

221143421434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8505516224.

The product of its digits is 18432, while the sum is 31.

Adding to 221143421434 its reverse (434124341122), we get a palindrome (655267762556).

The spelling of 221143421434 in words is "two hundred twenty-one billion, one hundred forty-three million, four hundred twenty-one thousand, four hundred thirty-four".