1212220322 has 4 divisors (see below), whose sum is σ = 1818330486. Its totient is φ = 606110160.

The previous prime is 1212220301. The next prime is 1212220333. The reversal of 1212220322 is 2230222121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2230222121 = 6359 ⋅350719.

It can be written as a sum of positive squares in only one way, i.e., 1096205881 + 116014441 = 33109^2 + 10771^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1212220322.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303055079 + ... + 303055082.

Almost surely, 2^1212220322 is an apocalyptic number.

1212220322 is a deficient number, since it is larger than the sum of its proper divisors (606110164).

1212220322 is an equidigital number, since it uses as much as digits as its factorization.

1212220322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606110163.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1212220322 is about 34816.9545193143. The cubic root of 1212220322 is about 1066.2536236509.

Adding to 1212220322 its reverse (2230222121), we get a palindrome (3442442443).

The spelling of 1212220322 in words is "one billion, two hundred twelve million, two hundred twenty thousand, three hundred twenty-two".