161206211233 has 2 divisors, whose sum is σ = 161206211234. Its totient is φ = 161206211232.

The previous prime is 161206211209. The next prime is 161206211249. The reversal of 161206211233 is 332112602161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161063360929 + 142850304 = 401327^2 + 11952^2 .

It is a cyclic number.

It is not a de Polignac number, because 161206211233 - 2²¹ = 161204114081 is a prime.

It is not a weakly prime, because it can be changed into another prime (161206211203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80603105616 + 80603105617.

It is an arithmetic number, because the mean of its divisors is an integer number (80603105617).

Almost surely, 2^161206211233 is an apocalyptic number.

It is an amenable number.

161206211233 is a deficient number, since it is larger than the sum of its proper divisors (1).

161206211233 is an equidigital number, since it uses as much as digits as its factorization.

161206211233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

Adding to 161206211233 its reverse (332112602161), we get a palindrome (493318813394).

The spelling of 161206211233 in words is "one hundred sixty-one billion, two hundred six million, two hundred eleven thousand, two hundred thirty-three".