221122211210 has 8 divisors (see below), whose sum is σ = 398019980196. Its totient is φ = 88448884480.

The previous prime is 221122211207. The next prime is 221122211279. The reversal of 221122211210 is 12112221122.

It can be written as a sum of positive squares in 2 ways, for example, as 220104537409 + 1017673801 = 469153^2 + 31901^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11056110551 + ... + 11056110570.

Almost surely, 2^221122211210 is an apocalyptic number.

221122211210 is a deficient number, since it is larger than the sum of its proper divisors (176897768986).

221122211210 is a wasteful number, since it uses less digits than its factorization.

221122211210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22112221128.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221122211210 its reverse (12112221122), we get a palindrome (233234432332).

It can be divided in two parts, 22112 and 2211210, that added together give a palindrome (2233322).

The spelling of 221122211210 in words is "two hundred twenty-one billion, one hundred twenty-two million, two hundred eleven thousand, two hundred ten".