221230130312 has 16 divisors (see below), whose sum is σ = 415005092700. Its totient is φ = 110562105600.

The previous prime is 221230130299. The next prime is 221230130333. The reversal of 221230130312 is 213031032122.

It can be written as a sum of positive squares in 2 ways, for example, as 220004150116 + 1225980196 = 469046^2 + 35014^2 .

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 3 ways as a sum of consecutive naturals, for example, 6602189 + ... + 6635612.

Almost surely, 2^221230130312 is an apocalyptic number.

It is an amenable number.

221230130312 is a deficient number, since it is larger than the sum of its proper divisors (193774962388).

221230130312 is a wasteful number, since it uses less digits than its factorization.

221230130312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13239896 (or 13239892 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 221230130312 its reverse (213031032122), we get a palindrome (434261162434).

The spelling of 221230130312 in words is "two hundred twenty-one billion, two hundred thirty million, one hundred thirty thousand, three hundred twelve".