221434013434 has 32 divisors (see below), whose sum is σ = 357537647376. Its totient is φ = 102472197120.

The previous prime is 221434013387. The next prime is 221434013441. The reversal of 221434013434 is 434310434122.

It can be written as a sum of positive squares in 8 ways, for example, as 192586689409 + 28847324025 = 438847^2 + 169845^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221434013396 and 221434013405.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11515612 + ... + 11534824.

Almost surely, 2^221434013434 is an apocalyptic number.

221434013434 is a deficient number, since it is larger than the sum of its proper divisors (136103633942).

221434013434 is a wasteful number, since it uses less digits than its factorization.

221434013434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24850.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 221434013434 its reverse (434310434122), we get a palindrome (655744447556).

The spelling of 221434013434 in words is "two hundred twenty-one billion, four hundred thirty-four million, thirteen thousand, four hundred thirty-four".