1221134320222 has 16 divisors (see below), whose sum is σ = 1848577888080. Its totient is φ = 604942126272.

The previous prime is 1221134320199. The next prime is 1221134320291. The reversal of 1221134320222 is 2220234311221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6409713 + ... + 6597475.

It is an arithmetic number, because the mean of its divisors is an integer number (115536118005).

Almost surely, 2^{1221134320222} is an apocalyptic number.

1221134320222 is a deficient number, since it is larger than the sum of its proper divisors (627443567858).

1221134320222 is a wasteful number, since it uses less digits than its factorization.

1221134320222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217707.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 1221134320222 its reverse (2220234311221), we get a palindrome (3441368631443).

Subtracting 1221134320222 from its reverse (2220234311221), we obtain a palindrome (999099990999).

The spelling of 1221134320222 in words is "one trillion, two hundred twenty-one billion, one hundred thirty-four million, three hundred twenty thousand, two hundred twenty-two".