221001222122 has 8 divisors (see below), whose sum is σ = 332037379200. Its totient is φ = 110322095724.

The previous prime is 221001222107. The next prime is 221001222139. The reversal of 221001222122 is 221222100122.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 221001222122.

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, 89256122 + ... + 89258597.

It is an arithmetic number, because the mean of its divisors is an integer number (41504672400).

Almost surely, 2^221001222122 is an apocalyptic number.

221001222122 is a deficient number, since it is larger than the sum of its proper divisors (111036157078).

221001222122 is a wasteful number, since it uses less digits than its factorization.

221001222122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178515340.

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

Adding to 221001222122 its reverse (221222100122), we get a palindrome (442223322244).

The spelling of 221001222122 in words is "two hundred twenty-one billion, one million, two hundred twenty-two thousand, one hundred twenty-two".