123451141661 has 2 divisors, whose sum is σ = 123451141662. Its totient is φ = 123451141660.

The previous prime is 123451141607. The next prime is 123451141663. The reversal of 123451141661 is 166141154321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122373332761 + 1077808900 = 349819^2 + 32830^2 .

It is a cyclic number.

It is not a de Polignac number, because 123451141661 - 2²² = 123446947357 is a prime.

Together with 123451141663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123451141663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61725570830 + 61725570831.

It is an arithmetic number, because the mean of its divisors is an integer number (61725570831).

Almost surely, 2^123451141661 is an apocalyptic number.

It is an amenable number.

123451141661 is a deficient number, since it is larger than the sum of its proper divisors (1).

123451141661 is an equidigital number, since it uses as much as digits as its factorization.

123451141661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 35.

Adding to 123451141661 its reverse (166141154321), we get a palindrome (289592295982).

The spelling of 123451141661 in words is "one hundred twenty-three billion, four hundred fifty-one million, one hundred forty-one thousand, six hundred sixty-one".