221230012 has 24 divisors (see below), whose sum is σ = 408945152. Its totient is φ = 104554800.

The previous prime is 221230007. The next prime is 221230013. The reversal of 221230012 is 210032122.

It is a junction number, because it is equal to n+sod(n) for n = 221229974 and 221230001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221230013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15414 + ... + 26077.

Almost surely, 2^221230012 is an apocalyptic number.

It is an amenable number.

221230012 is a deficient number, since it is larger than the sum of its proper divisors (187715140).

221230012 is a wasteful number, since it uses less digits than its factorization.

221230012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41569 (or 41567 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 221230012 is about 14873.8028761981. The cubic root of 221230012 is about 604.8040364350.

Adding to 221230012 its reverse (210032122), we get a palindrome (431262134).

The spelling of 221230012 in words is "two hundred twenty-one million, two hundred thirty thousand, twelve".