201001232123161 has 2 divisors, whose sum is σ = 201001232123162. Its totient is φ = 201001232123160.

The previous prime is 201001232123137. The next prime is 201001232123173. The reversal of 201001232123161 is 161321232100102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111189010944400 + 89812221178761 = 10544620^2 + 9476931^2 .

It is a cyclic number.

It is not a de Polignac number, because 201001232123161 - 2¹¹ = 201001232121113 is a prime.

It is not a weakly prime, because it can be changed into another prime (201001232121161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100500616061580 + 100500616061581.

It is an arithmetic number, because the mean of its divisors is an integer number (100500616061581).

Almost surely, 2^{201001232123161} is an apocalyptic number.

It is an amenable number.

201001232123161 is a deficient number, since it is larger than the sum of its proper divisors (1).

201001232123161 is an equidigital number, since it uses as much as digits as its factorization.

201001232123161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 201001232123161 its reverse (161321232100102), we get a palindrome (362322464223263).

The spelling of 201001232123161 in words is "two hundred one trillion, one billion, two hundred thirty-two million, one hundred twenty-three thousand, one hundred sixty-one".