1212222212 has 12 divisors (see below), whose sum is σ = 2124853836. Its totient is φ = 605121120.

The previous prime is 1212222203. The next prime is 1212222217. The reversal of 1212222212 is 2122222121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 418447936 + 793774276 = 20456^2 + 28174^2 .

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1212222217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244739 + ... + 249642.

It is an arithmetic number, because the mean of its divisors is an integer number (177071153).

Almost surely, 2^1212222212 is an apocalyptic number.

It is an amenable number.

1212222212 is a deficient number, since it is larger than the sum of its proper divisors (912631624).

1212222212 is a wasteful number, since it uses less digits than its factorization.

1212222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494998 (or 494996 counting only the distinct ones).

The product of its digits is 128, while the sum is 17.

The square root of 1212222212 is about 34816.9816612526. The cubic root of 1212222212 is about 1066.2541777907.

Adding to 1212222212 its reverse (2122222121), we get a palindrome (3334444333).

Subtracting 1212222212 from its reverse (2122222121), we obtain a palindrome (909999909).

The spelling of 1212222212 in words is "one billion, two hundred twelve million, two hundred twenty-two thousand, two hundred twelve".