1221111322 has 16 divisors (see below), whose sum is σ = 1845828000. Its totient is φ = 605843920.

The previous prime is 1221111319. The next prime is 1221111349. The reversal of 1221111322 is 2231111221.

It is a super-2 number, since 2×1221111322² = 2982225721433175368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221111296 and 1221111305.

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 7 ways as a sum of consecutive naturals, for example, 481197 + ... + 483727.

It is an arithmetic number, because the mean of its divisors is an integer number (115364250).

Almost surely, 2^1221111322 is an apocalyptic number.

1221111322 is a deficient number, since it is larger than the sum of its proper divisors (624716678).

1221111322 is a wasteful number, since it uses less digits than its factorization.

1221111322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4301.

The product of its digits is 48, while the sum is 16.

The square root of 1221111322 is about 34944.4033000994. The cubic root of 1221111322 is about 1068.8540799338.

Adding to 1221111322 its reverse (2231111221), we get a palindrome (3452222543).

The spelling of 1221111322 in words is "one billion, two hundred twenty-one million, one hundred eleven thousand, three hundred twenty-two".