1221322241 has 8 divisors (see below), whose sum is σ = 1276537344. Its totient is φ = 1166283360.

The previous prime is 1221322231. The next prime is 1221322253. The reversal of 1221322241 is 1422231221.

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

It is a cyclic number.

It is not a de Polignac number, because 1221322241 - 2¹⁸ = 1221060097 is a prime.

It is a super-2 number, since 2×1221322241² = 2983256032722524162, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1221322231) by changing a digit.

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, 29780 + ... + 57701.

It is an arithmetic number, because the mean of its divisors is an integer number (159567168).

Almost surely, 2^1221322241 is an apocalyptic number.

It is an amenable number.

1221322241 is a deficient number, since it is larger than the sum of its proper divisors (55215103).

1221322241 is an equidigital number, since it uses as much as digits as its factorization.

1221322241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88111.

The product of its digits is 384, while the sum is 20.

The square root of 1221322241 is about 34947.4210922637. The cubic root of 1221322241 is about 1068.9156164076.

Adding to 1221322241 its reverse (1422231221), we get a palindrome (2643553462).

The spelling of 1221322241 in words is "one billion, two hundred twenty-one million, three hundred twenty-two thousand, two hundred forty-one".