22202222212 has 6 divisors (see below), whose sum is σ = 38853888878. Its totient is φ = 11101111104.

The previous prime is 22202222197. The next prime is 22202222213. The reversal of 22202222212 is 21222220222.

It can be written as a sum of positive squares in only one way, i.e., 21229655616 + 972566596 = 145704^2 + 31186^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22202222212.

It is not an unprimeable number, because it can be changed into a prime (22202222213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2775277773 + ... + 2775277780.

Almost surely, 2^22202222212 is an apocalyptic number.

It is an amenable number.

22202222212 is a deficient number, since it is larger than the sum of its proper divisors (16651666666).

22202222212 is a wasteful number, since it uses less digits than its factorization.

22202222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5550555557 (or 5550555555 counting only the distinct ones).

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

Adding to 22202222212 its reverse (21222220222), we get a palindrome (43424442434).

The spelling of 22202222212 in words is "twenty-two billion, two hundred two million, two hundred twenty-two thousand, two hundred twelve".