221230421332 has 18 divisors (see below), whose sum is σ = 411266589902. Its totient is φ = 104108433024.

The previous prime is 221230421297. The next prime is 221230421389. The reversal of 221230421332 is 233124032122.

It can be written as a sum of positive squares in 3 ways, for example, as 61259220036 + 159971201296 = 247506^2 + 399964^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221230421297 and 221230421306.

It is a congruent number.

It is an unprimeable number.

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, 95686743 + ... + 95689054.

Almost surely, 2^221230421332 is an apocalyptic number.

It is an amenable number.

221230421332 is a deficient number, since it is larger than the sum of its proper divisors (190036168570).

221230421332 is a wasteful number, since it uses less digits than its factorization.

221230421332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191375835 (or 191375816 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 221230421332 its reverse (233124032122), we get a palindrome (454354453454).

The spelling of 221230421332 in words is "two hundred twenty-one billion, two hundred thirty million, four hundred twenty-one thousand, three hundred thirty-two".