221210221412 has 24 divisors (see below), whose sum is σ = 390993697080. Its totient is φ = 109497977600.

The previous prime is 221210221367. The next prime is 221210221417. The reversal of 221210221412 is 214122012122.

It is a happy number.

221210221412 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 53590398016 + 167619823396 = 231496^2 + 409414^2 .

It is not an unprimeable number, because it can be changed into a prime (221210221417) 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, 4491014 + ... + 4540002.

It is an arithmetic number, because the mean of its divisors is an integer number (16291404045).

Almost surely, 2^221210221412 is an apocalyptic number.

It is an amenable number.

221210221412 is a deficient number, since it is larger than the sum of its proper divisors (169783475668).

221210221412 is a wasteful number, since it uses less digits than its factorization.

221210221412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60271 (or 60269 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221210221412 its reverse (214122012122), we get a palindrome (435332233534).

The spelling of 221210221412 in words is "two hundred twenty-one billion, two hundred ten million, two hundred twenty-one thousand, four hundred twelve".