1213121222 has 8 divisors (see below), whose sum is σ = 1819909272. Its totient is φ = 606484800.

The previous prime is 1213121209. The next prime is 1213121251. The reversal of 1213121222 is 2221213121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1213121222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15179 + ... + 51542.

It is an arithmetic number, because the mean of its divisors is an integer number (227488659).

Almost surely, 2^1213121222 is an apocalyptic number.

1213121222 is a deficient number, since it is larger than the sum of its proper divisors (606788050).

1213121222 is an equidigital number, since it uses as much as digits as its factorization.

1213121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75814.

The product of its digits is 96, while the sum is 17.

The square root of 1213121222 is about 34829.8897787518. The cubic root of 1213121222 is about 1066.5176983153.

Adding to 1213121222 its reverse (2221213121), we get a palindrome (3434334343).

The spelling of 1213121222 in words is "one billion, two hundred thirteen million, one hundred twenty-one thousand, two hundred twenty-two".