221000220221210 has 16 divisors (see below), whose sum is σ = 397829782798056. Its totient is φ = 88393557777408.

The previous prime is 221000220221173. The next prime is 221000220221237. The reversal of 221000220221210 is 12122022000122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 220321150281961 + 679069939249 = 14843219^2 + 824057^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 816146747 + ... + 816417486.

Almost surely, 2^{221000220221210} is an apocalyptic number.

221000220221210 is a deficient number, since it is larger than the sum of its proper divisors (176829562576846).

221000220221210 is a wasteful number, since it uses less digits than its factorization.

221000220221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632577777.

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

Adding to 221000220221210 its reverse (12122022000122), we get a palindrome (233122242221332).

The spelling of 221000220221210 in words is "two hundred twenty-one trillion, two hundred twenty million, two hundred twenty-one thousand, two hundred ten".