1221044204001 has 8 divisors (see below), whose sum is σ = 1628100673024. Its totient is φ = 814008602160.

The previous prime is 1221044203877. The next prime is 1221044204021. The reversal of 1221044204001 is 1004024401221.

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

It is not a de Polignac number, because 1221044204001 - 2¹⁰ = 1221044202977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221044204021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5079745 + ... + 5314686.

It is an arithmetic number, because the mean of its divisors is an integer number (203512584128).

Almost surely, 2^{1221044204001} is an apocalyptic number.

It is an amenable number.

1221044204001 is a deficient number, since it is larger than the sum of its proper divisors (407056469023).

1221044204001 is a wasteful number, since it uses less digits than its factorization.

1221044204001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10433591.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 1221044204001 its reverse (1004024401221), we get a palindrome (2225068605222).

The spelling of 1221044204001 in words is "one trillion, two hundred twenty-one billion, forty-four million, two hundred four thousand, one".