1221303001204 has 48 divisors (see below), whose sum is σ = 2658632469696. Its totient is φ = 482291596800.

The previous prime is 1221303001199. The next prime is 1221303001207. The reversal of 1221303001204 is 4021003031221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221303001207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62788662 + ... + 62808109.

It is an arithmetic number, because the mean of its divisors is an integer number (55388176452).

Almost surely, 2^{1221303001204} is an apocalyptic number.

It is an amenable number.

1221303001204 is an abundant number, since it is smaller than the sum of its proper divisors (1437329468492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221303001204 is a wasteful number, since it uses less digits than its factorization.

1221303001204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125596816 (or 125596814 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 1221303001204 its reverse (4021003031221), we get a palindrome (5242306032425).

The spelling of 1221303001204 in words is "one trillion, two hundred twenty-one billion, three hundred three million, one thousand, two hundred four".