123210123221161 has 2 divisors, whose sum is σ = 123210123221162. Its totient is φ = 123210123221160.

The previous prime is 123210123221083. The next prime is 123210123221249. The reversal of 123210123221161 is 161122321012321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122966031890025 + 244091331136 = 11089005^2 + 494056^2 .

It is a cyclic number.

It is not a de Polignac number, because 123210123221161 - 2²¹ = 123210121124009 is a prime.

It is not a weakly prime, because it can be changed into another prime (123210123251161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61605061610580 + 61605061610581.

It is an arithmetic number, because the mean of its divisors is an integer number (61605061610581).

Almost surely, 2^{123210123221161} is an apocalyptic number.

It is an amenable number.

123210123221161 is a deficient number, since it is larger than the sum of its proper divisors (1).

123210123221161 is an equidigital number, since it uses as much as digits as its factorization.

123210123221161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

Adding to 123210123221161 its reverse (161122321012321), we get a palindrome (284332444233482).

The spelling of 123210123221161 in words is "one hundred twenty-three trillion, two hundred ten billion, one hundred twenty-three million, two hundred twenty-one thousand, one hundred sixty-one".