22222201112212 has 6 divisors (see below), whose sum is σ = 38888851946378. Its totient is φ = 11111100556104.

The previous prime is 22222201112197. The next prime is 22222201112213. The reversal of 22222201112212 is 21221110222222.

It can be written as a sum of positive squares in only one way, i.e., 20040896610436 + 2181304501776 = 4476706^2 + 1476924^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222201112213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2777775139023 + ... + 2777775139030.

Almost surely, 2^{22222201112212} is an apocalyptic number.

It is an amenable number.

22222201112212 is a deficient number, since it is larger than the sum of its proper divisors (16666650834166).

22222201112212 is a wasteful number, since it uses less digits than its factorization.

22222201112212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555550278057 (or 5555550278055 counting only the distinct ones).

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

Adding to 22222201112212 its reverse (21221110222222), we get a palindrome (43443311334434).

The spelling of 22222201112212 in words is "twenty-two trillion, two hundred twenty-two billion, two hundred one million, one hundred twelve thousand, two hundred twelve".