1221211213303 has 8 divisors (see below), whose sum is σ = 1223067396096. Its totient is φ = 1219356382200.

The previous prime is 1221211213289. The next prime is 1221211213337. The reversal of 1221211213303 is 3033121121221.

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 1221211213303 - 2⁹ = 1221211212791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221211213603) 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, 1477788 + ... + 2150878.

It is an arithmetic number, because the mean of its divisors is an integer number (152883424512).

Almost surely, 2^{1221211213303} is an apocalyptic number.

1221211213303 is a deficient number, since it is larger than the sum of its proper divisors (1856182793).

1221211213303 is a wasteful number, since it uses less digits than its factorization.

1221211213303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675845.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1221211213303 its reverse (3033121121221), we get a palindrome (4254332334524).

The spelling of 1221211213303 in words is "one trillion, two hundred twenty-one billion, two hundred eleven million, two hundred thirteen thousand, three hundred three".