1213311122 has 4 divisors (see below), whose sum is σ = 1819966686. Its totient is φ = 606655560.

The previous prime is 1213311103. The next prime is 1213311149. The reversal of 1213311122 is 2211133121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2211133121 = 179 ⋅12352699.

It can be written as a sum of positive squares in only one way, i.e., 1027779481 + 185531641 = 32059^2 + 13621^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1213311122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303327779 + ... + 303327782.

Almost surely, 2^1213311122 is an apocalyptic number.

1213311122 is a deficient number, since it is larger than the sum of its proper divisors (606655564).

1213311122 is an equidigital number, since it uses as much as digits as its factorization.

1213311122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606655563.

The product of its digits is 72, while the sum is 17.

The square root of 1213311122 is about 34832.6157788932. The cubic root of 1213311122 is about 1066.5733457203.

Adding to 1213311122 its reverse (2211133121), we get a palindrome (3424444243).

The spelling of 1213311122 in words is "one billion, two hundred thirteen million, three hundred eleven thousand, one hundred twenty-two".