123221101361 has 2 divisors, whose sum is σ = 123221101362. Its totient is φ = 123221101360.

The previous prime is 123221101307. The next prime is 123221101429. The reversal of 123221101361 is 163101122321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122006997025 + 1214104336 = 349295^2 + 34844^2 .

It is an emirp because it is prime and its reverse (163101122321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123221101361 is a prime.

It is not a weakly prime, because it can be changed into another prime (123221104361) 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, 61610550680 + 61610550681.

It is an arithmetic number, because the mean of its divisors is an integer number (61610550681).

Almost surely, 2^123221101361 is an apocalyptic number.

It is an amenable number.

123221101361 is a deficient number, since it is larger than the sum of its proper divisors (1).

123221101361 is an equidigital number, since it uses as much as digits as its factorization.

123221101361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 123221101361 its reverse (163101122321), we get a palindrome (286322223682).

The spelling of 123221101361 in words is "one hundred twenty-three billion, two hundred twenty-one million, one hundred one thousand, three hundred sixty-one".