1213453221443 has 2 divisors, whose sum is σ = 1213453221444. Its totient is φ = 1213453221442.

The previous prime is 1213453221401. The next prime is 1213453221467. The reversal of 1213453221443 is 3441223543121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213453221443 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213453221493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606726610721 + 606726610722.

It is an arithmetic number, because the mean of its divisors is an integer number (606726610722).

Almost surely, 2^{1213453221443} is an apocalyptic number.

1213453221443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213453221443 is an equidigital number, since it uses as much as digits as its factorization.

1213453221443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 35.

Adding to 1213453221443 its reverse (3441223543121), we get a palindrome (4654676764564).

The spelling of 1213453221443 in words is "one trillion, two hundred thirteen billion, four hundred fifty-three million, two hundred twenty-one thousand, four hundred forty-three".