161200331023 has 2 divisors, whose sum is σ = 161200331024. Its totient is φ = 161200331022.

The previous prime is 161200331003. The next prime is 161200331053. The reversal of 161200331023 is 320133002161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161200331023 - 2³⁷ = 23761377551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161200330985 and 161200331003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161200331003) 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, 80600165511 + 80600165512.

It is an arithmetic number, because the mean of its divisors is an integer number (80600165512).

Almost surely, 2^161200331023 is an apocalyptic number.

161200331023 is a deficient number, since it is larger than the sum of its proper divisors (1).

161200331023 is an equidigital number, since it uses as much as digits as its factorization.

161200331023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 161200331023 its reverse (320133002161), we get a palindrome (481333333184).

The spelling of 161200331023 in words is "one hundred sixty-one billion, two hundred million, three hundred thirty-one thousand, twenty-three".