1221103233433 has 2 divisors, whose sum is σ = 1221103233434. Its totient is φ = 1221103233432.

The previous prime is 1221103233409. The next prime is 1221103233437. The reversal of 1221103233433 is 3343323011221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1127731430809 + 93371802624 = 1061947^2 + 305568^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221103233433 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221103233437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610551616716 + 610551616717.

It is an arithmetic number, because the mean of its divisors is an integer number (610551616717).

Almost surely, 2^{1221103233433} is an apocalyptic number.

It is an amenable number.

1221103233433 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221103233433 is an equidigital number, since it uses as much as digits as its factorization.

1221103233433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 1221103233433 its reverse (3343323011221), we get a palindrome (4564426244654).

The spelling of 1221103233433 in words is "one trillion, two hundred twenty-one billion, one hundred three million, two hundred thirty-three thousand, four hundred thirty-three".