1213303012221 has 16 divisors (see below), whose sum is σ = 1623920760000. Its totient is φ = 805781394048.

The previous prime is 1213303012193. The next prime is 1213303012231. The reversal of 1213303012221 is 1222103033121.

It is not a de Polignac number, because 1213303012221 - 2¹⁰ = 1213303011197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213303012231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 545950 + ... + 1650656.

It is an arithmetic number, because the mean of its divisors is an integer number (101495047500).

Almost surely, 2^{1213303012221} is an apocalyptic number.

It is an amenable number.

1213303012221 is a deficient number, since it is larger than the sum of its proper divisors (410617747779).

1213303012221 is a wasteful number, since it uses less digits than its factorization.

1213303012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106108.

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

Adding to 1213303012221 its reverse (1222103033121), we get a palindrome (2435406045342).

The spelling of 1213303012221 in words is "one trillion, two hundred thirteen billion, three hundred three million, twelve thousand, two hundred twenty-one".