1221311122 has 8 divisors (see below), whose sum is σ = 1832138316. Its totient is φ = 610598352.

The previous prime is 1221311111. The next prime is 1221311149. The reversal of 1221311122 is 2211131221.

It can be written as a sum of positive squares in 2 ways, for example, as 933974721 + 287336401 = 30561^2 + 16951^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1221311096 and 1221311105.

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, 6888 + ... + 49900.

Almost surely, 2^1221311122 is an apocalyptic number.

1221311122 is a deficient number, since it is larger than the sum of its proper divisors (610827194).

1221311122 is a wasteful number, since it uses less digits than its factorization.

1221311122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57212.

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

The square root of 1221311122 is about 34947.2620100631. The cubic root of 1221311122 is about 1068.9123725712.

Adding to 1221311122 its reverse (2211131221), we get a palindrome (3432442343).

The spelling of 1221311122 in words is "one billion, two hundred twenty-one million, three hundred eleven thousand, one hundred twenty-two".