22222110212212 has 6 divisors (see below), whose sum is σ = 38888692871378. Its totient is φ = 11111055106104.

The previous prime is 22222110212201. The next prime is 22222110212219. The reversal of 22222110212212 is 21221201122222.

It can be written as a sum of positive squares in only one way, i.e., 16914827719696 + 5307282492516 = 4112764^2 + 2303754^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222110212219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2777763776523 + ... + 2777763776530.

Almost surely, 2^{22222110212212} is an apocalyptic number.

It is an amenable number.

22222110212212 is a deficient number, since it is larger than the sum of its proper divisors (16666582659166).

22222110212212 is a wasteful number, since it uses less digits than its factorization.

22222110212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5555527553057 (or 5555527553055 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 22222110212212 its reverse (21221201122222), we get a palindrome (43443311334434).

The spelling of 22222110212212 in words is "twenty-two trillion, two hundred twenty-two billion, one hundred ten million, two hundred twelve thousand, two hundred twelve".