221012234 has 8 divisors (see below), whose sum is σ = 335512800. Its totient is φ = 109174636.

The previous prime is 221012227. The next prime is 221012249. The reversal of 221012234 is 432210122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 665534 + ... + 665865.

It is an arithmetic number, because the mean of its divisors is an integer number (41939100).

Almost surely, 2^221012234 is an apocalyptic number.

221012234 is a deficient number, since it is larger than the sum of its proper divisors (114500566).

221012234 is a wasteful number, since it uses less digits than its factorization.

221012234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331484.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 221012234 is about 14866.4802155722. The cubic root of 221012234 is about 604.6055156660.

Adding to 221012234 its reverse (432210122), we get a palindrome (653222356).

The spelling of 221012234 in words is "two hundred twenty-one million, twelve thousand, two hundred thirty-four".