221210222012 has 24 divisors (see below), whose sum is σ = 416918871600. Its totient is φ = 102091470336.

The previous prime is 221210222011. The next prime is 221210222021. The reversal of 221210222012 is 210222012122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221210222011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 941039 + ... + 1152377.

It is an arithmetic number, because the mean of its divisors is an integer number (17371619650).

Almost surely, 2^221210222012 is an apocalyptic number.

It is an amenable number.

221210222012 is a deficient number, since it is larger than the sum of its proper divisors (195708649588).

221210222012 is a wasteful number, since it uses less digits than its factorization.

221210222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231485 (or 231483 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221210222012 its reverse (210222012122), we get a palindrome (431432234134).

The spelling of 221210222012 in words is "two hundred twenty-one billion, two hundred ten million, two hundred twenty-two thousand, twelve".