221221210010 has 32 divisors (see below), whose sum is σ = 402329289600. Its totient is φ = 87571281600.

The previous prime is 221221209991. The next prime is 221221210057. The reversal of 221221210010 is 10012122122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2150531 + ... + 2251049.

It is an arithmetic number, because the mean of its divisors is an integer number (12572790300).

Almost surely, 2^221221210010 is an apocalyptic number.

221221210010 is a deficient number, since it is larger than the sum of its proper divisors (181108079590).

221221210010 is a wasteful number, since it uses less digits than its factorization.

221221210010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102806.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221221210010 its reverse (10012122122), we get a palindrome (231233332132).

It can be divided in two parts, 2212212 and 10010, that added together give a palindrome (2222222).

The spelling of 221221210010 in words is "two hundred twenty-one billion, two hundred twenty-one million, two hundred ten thousand, ten".