1221203321301 has 8 divisors (see below), whose sum is σ = 1667985024384. Its totient is φ = 794278582880.

The previous prime is 1221203321291. The next prime is 1221203321311. The reversal of 1221203321301 is 1031233021221.

It is an interprime number because it is at equal distance from previous prime (1221203321291) and next prime (1221203321311).

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 1221203321301 - 2⁹ = 1221203320789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221203321311) 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, 4964241021 + ... + 4964241266.

It is an arithmetic number, because the mean of its divisors is an integer number (208498128048).

Almost surely, 2^{1221203321301} is an apocalyptic number.

It is an amenable number.

1221203321301 is a deficient number, since it is larger than the sum of its proper divisors (446781703083).

1221203321301 is an equidigital number, since it uses as much as digits as its factorization.

1221203321301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9928482331.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1221203321301 its reverse (1031233021221), we get a palindrome (2252436342522).

The spelling of 1221203321301 in words is "one trillion, two hundred twenty-one billion, two hundred three million, three hundred twenty-one thousand, three hundred one".