1213444353321 has 12 divisors (see below), whose sum is σ = 1800124656772. Its totient is φ = 787099039776.

The previous prime is 1213444353283. The next prime is 1213444353337. The reversal of 1213444353321 is 1233534443121.

1213444353321 is a `hidden beast` number, since 1 + 2 + 134 + 443 + 53 + 32 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 557650497600 + 655793855721 = 746760^2 + 809811^2 .

It is not a de Polignac number, because 1213444353321 - 2⁷ = 1213444353193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213444353361) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1821988186 + ... + 1821988851.

Almost surely, 2^{1213444353321} is an apocalyptic number.

It is an amenable number.

1213444353321 is a deficient number, since it is larger than the sum of its proper divisors (586680303451).

1213444353321 is a wasteful number, since it uses less digits than its factorization.

1213444353321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3643977080 (or 3643977077 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

Adding to 1213444353321 its reverse (1233534443121), we get a palindrome (2446978796442).

The spelling of 1213444353321 in words is "one trillion, two hundred thirteen billion, four hundred forty-four million, three hundred fifty-three thousand, three hundred twenty-one".