123021454427 has 2 divisors, whose sum is σ = 123021454428. Its totient is φ = 123021454426.

The previous prime is 123021454417. The next prime is 123021454453. The reversal of 123021454427 is 724454120321.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123021454427 is a prime.

It is not a weakly prime, because it can be changed into another prime (123021454417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61510727213 + 61510727214.

It is an arithmetic number, because the mean of its divisors is an integer number (61510727214).

Almost surely, 2^123021454427 is an apocalyptic number.

123021454427 is a deficient number, since it is larger than the sum of its proper divisors (1).

123021454427 is an equidigital number, since it uses as much as digits as its factorization.

123021454427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 53760, while the sum is 35.

Adding to 123021454427 its reverse (724454120321), we get a palindrome (847475574748).

The spelling of 123021454427 in words is "one hundred twenty-three billion, twenty-one million, four hundred fifty-four thousand, four hundred twenty-seven".