221030012 has 24 divisors (see below), whose sum is σ = 445441920. Its totient is φ = 94002480.

The previous prime is 221030009. The next prime is 221030053. The reversal of 221030012 is 210030122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221029975 and 221030002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26462 + ... + 33797.

It is an arithmetic number, because the mean of its divisors is an integer number (18560080).

Almost surely, 2^221030012 is an apocalyptic number.

It is an amenable number.

221030012 is an abundant number, since it is smaller than the sum of its proper divisors (224411908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221030012 is a wasteful number, since it uses less digits than its factorization.

221030012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60401 (or 60399 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 221030012 is about 14867.0781258457. The cubic root of 221030012 is about 604.6217265162.

Adding to 221030012 its reverse (210030122), we get a palindrome (431060134).

The spelling of 221030012 in words is "two hundred twenty-one million, thirty thousand, twelve".