221222222102212 has 12 divisors (see below), whose sum is σ = 387145413943596. Its totient is φ = 110609246689760.

The previous prime is 221222222102173. The next prime is 221222222102213. The reversal of 221222222102212 is 212201222222122.

It can be written as a sum of positive squares in 2 ways, for example, as 68646958339716 + 152575263762496 = 8285346^2 + 12352136^2 .

It is not an unprimeable number, because it can be changed into a prime (221222222102213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 465823339 + ... + 466298002.

It is an arithmetic number, because the mean of its divisors is an integer number (32262117828633).

Almost surely, 2^{221222222102212} is an apocalyptic number.

It is an amenable number.

221222222102212 is a deficient number, since it is larger than the sum of its proper divisors (165923191841384).

221222222102212 is a wasteful number, since it uses less digits than its factorization.

221222222102212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932180678 (or 932180676 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 221222222102212 its reverse (212201222222122), we get a palindrome (433423444324334).

The spelling of 221222222102212 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, two hundred twenty-two million, one hundred two thousand, two hundred twelve".