221211222202 has 8 divisors (see below), whose sum is σ = 331822609236. Its totient is φ = 110603685792.

The previous prime is 221211222179. The next prime is 221211222217. The reversal of 221211222202 is 202222112122.

It can be written as a sum of positive squares in 2 ways, for example, as 186227634681 + 34983587521 = 431541^2 + 187039^2 .

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 221211222202.

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, 814473 + ... + 1051564.

Almost surely, 2^221211222202 is an apocalyptic number.

221211222202 is a deficient number, since it is larger than the sum of its proper divisors (110611387034).

221211222202 is a wasteful number, since it uses less digits than its factorization.

221211222202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1925312.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 221211222202 its reverse (202222112122), we get a palindrome (423433334324).

The spelling of 221211222202 in words is "two hundred twenty-one billion, two hundred eleven million, two hundred twenty-two thousand, two hundred two".