222220220212 has 6 divisors (see below), whose sum is σ = 388885385378. Its totient is φ = 111110110104.

The previous prime is 222220220207. The next prime is 222220220267. The reversal of 222220220212 is 212022022222.

It can be written as a sum of positive squares in only one way, i.e., 160861957776 + 61358262436 = 401076^2 + 247706^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 222220220212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27777527523 + ... + 27777527530.

Almost surely, 2^222220220212 is an apocalyptic number.

It is an amenable number.

222220220212 is a deficient number, since it is larger than the sum of its proper divisors (166665165166).

222220220212 is a wasteful number, since it uses less digits than its factorization.

222220220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55555055057 (or 55555055055 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 222220220212 its reverse (212022022222), we get a palindrome (434242242434).

The spelling of 222220220212 in words is "two hundred twenty-two billion, two hundred twenty million, two hundred twenty thousand, two hundred twelve".