1209120921233 has 2 divisors, whose sum is σ = 1209120921234. Its totient is φ = 1209120921232.

The previous prime is 1209120921227. The next prime is 1209120921311. The reversal of 1209120921233 is 3321290219021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1132230067969 + 76890853264 = 1064063^2 + 277292^2 .

It is a cyclic number.

It is not a de Polignac number, because 1209120921233 - 2²⁸ = 1208852485777 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1209120921193 and 1209120921202.

It is not a weakly prime, because it can be changed into another prime (1209120921223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604560460616 + 604560460617.

It is an arithmetic number, because the mean of its divisors is an integer number (604560460617).

Almost surely, 2^{1209120921233} is an apocalyptic number.

It is an amenable number.

1209120921233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1209120921233 is an equidigital number, since it uses as much as digits as its factorization.

1209120921233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 35.

The spelling of 1209120921233 in words is "one trillion, two hundred nine billion, one hundred twenty million, nine hundred twenty-one thousand, two hundred thirty-three".