1213221441 has 8 divisors (see below), whose sum is σ = 1618379680. Its totient is φ = 808438752.

The previous prime is 1213221437. The next prime is 1213221509. The reversal of 1213221441 is 1441223121.

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

It is not a de Polignac number, because 1213221441 - 2² = 1213221437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1213228441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86260 + ... + 99333.

It is an arithmetic number, because the mean of its divisors is an integer number (202297460).

Almost surely, 2^1213221441 is an apocalyptic number.

It is an amenable number.

1213221441 is a deficient number, since it is larger than the sum of its proper divisors (405158239).

1213221441 is a wasteful number, since it uses less digits than its factorization.

1213221441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187775.

The product of its digits is 384, while the sum is 21.

The square root of 1213221441 is about 34831.3284415051. The cubic root of 1213221441 is about 1066.5470667444.

Adding to 1213221441 its reverse (1441223121), we get a palindrome (2654444562).

The spelling of 1213221441 in words is "one billion, two hundred thirteen million, two hundred twenty-one thousand, four hundred forty-one".