1213221122 has 8 divisors (see below), whose sum is σ = 1840279500. Its totient is φ = 599794624.

The previous prime is 1213221077. The next prime is 1213221137. The reversal of 1213221122 is 2211223121.

It can be written as a sum of positive squares in 2 ways, for example, as 1108956601 + 104264521 = 33301^2 + 10211^2 .

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 1213221122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3407747 + ... + 3408102.

Almost surely, 2^1213221122 is an apocalyptic number.

1213221122 is a deficient number, since it is larger than the sum of its proper divisors (627058378).

1213221122 is an equidigital number, since it uses as much as digits as its factorization.

1213221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6815940.

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

The square root of 1213221122 is about 34831.3238622938. The cubic root of 1213221122 is about 1066.5469732664.

Adding to 1213221122 its reverse (2211223121), we get a palindrome (3424444243).

The spelling of 1213221122 in words is "one billion, two hundred thirteen million, two hundred twenty-one thousand, one hundred twenty-two".