1221231322241 has 24 divisors (see below), whose sum is σ = 1427422937760. Its totient is φ = 1041765278400.

The previous prime is 1221231322219. The next prime is 1221231322247. The reversal of 1221231322241 is 1422231321221.

It is not a de Polignac number, because 1221231322241 - 2⁶ = 1221231322177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1221231322241.

It is not an unprimeable number, because it can be changed into a prime (1221231322247) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 9162446 + ... + 9294776.

It is an arithmetic number, because the mean of its divisors is an integer number (59475955740).

Almost surely, 2^{1221231322241} is an apocalyptic number.

It is an amenable number.

1221231322241 is a deficient number, since it is larger than the sum of its proper divisors (206191615519).

1221231322241 is a wasteful number, since it uses less digits than its factorization.

1221231322241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133245 (or 133238 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

Adding to 1221231322241 its reverse (1422231321221), we get a palindrome (2643462643462).

The spelling of 1221231322241 in words is "one trillion, two hundred twenty-one billion, two hundred thirty-one million, three hundred twenty-two thousand, two hundred forty-one".