221222212010 has 16 divisors (see below), whose sum is σ = 398205480456. Its totient is φ = 88487662848.

The previous prime is 221222212009. The next prime is 221222212019. The reversal of 221222212010 is 10212222122.

It is a happy number.

221222212010 is digitally balanced in base 2, 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 155777827969 + 65444384041 = 394687^2 + 255821^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221222212010.

It is not an unprimeable number, because it can be changed into a prime (221222212019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1086014 + ... + 1273526.

Almost surely, 2^221222212010 is an apocalyptic number.

221222212010 is a deficient number, since it is larger than the sum of its proper divisors (176983268446).

221222212010 is a wasteful number, since it uses less digits than its factorization.

221222212010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305497.

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

Adding to 221222212010 its reverse (10212222122), we get a palindrome (231434434132).

The spelling of 221222212010 in words is "two hundred twenty-one billion, two hundred twenty-two million, two hundred twelve thousand, ten".