1221033042143 has 2 divisors, whose sum is σ = 1221033042144. Its totient is φ = 1221033042142.

The previous prime is 1221033042133. The next prime is 1221033042209. The reversal of 1221033042143 is 3412403301221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221033042143 - 2⁸ = 1221033041887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221033042133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610516521071 + 610516521072.

It is an arithmetic number, because the mean of its divisors is an integer number (610516521072).

Almost surely, 2^{1221033042143} is an apocalyptic number.

1221033042143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221033042143 is an equidigital number, since it uses as much as digits as its factorization.

1221033042143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 1221033042143 its reverse (3412403301221), we get a palindrome (4633436343364).

The spelling of 1221033042143 in words is "one trillion, two hundred twenty-one billion, thirty-three million, forty-two thousand, one hundred forty-three".