221233412 has 24 divisors (see below), whose sum is σ = 406728000. Its totient is φ = 105090656.

The previous prime is 221233403. The next prime is 221233433. The reversal of 221233412 is 214332122.

221233412 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 5639 + ... + 21777.

It is an arithmetic number, because the mean of its divisors is an integer number (16947000).

Almost surely, 2^221233412 is an apocalyptic number.

It is an amenable number.

221233412 is a deficient number, since it is larger than the sum of its proper divisors (185494588).

221233412 is a wasteful number, since it uses less digits than its factorization.

221233412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16315 (or 16313 counting only the distinct ones).

The product of its digits is 576, while the sum is 20.

The square root of 221233412 is about 14873.9171706716. The cubic root of 221233412 is about 604.8071347536.

Adding to 221233412 its reverse (214332122), we get a palindrome (435565534).

The spelling of 221233412 in words is "two hundred twenty-one million, two hundred thirty-three thousand, four hundred twelve".