123215320447 has 2 divisors, whose sum is σ = 123215320448. Its totient is φ = 123215320446.

The previous prime is 123215320351. The next prime is 123215320463. The reversal of 123215320447 is 744023512321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123215320447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123215320477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61607660223 + 61607660224.

It is an arithmetic number, because the mean of its divisors is an integer number (61607660224).

Almost surely, 2^123215320447 is an apocalyptic number.

123215320447 is a deficient number, since it is larger than the sum of its proper divisors (1).

123215320447 is an equidigital number, since it uses as much as digits as its factorization.

123215320447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 34.

Adding to 123215320447 its reverse (744023512321), we get a palindrome (867238832768).

The spelling of 123215320447 in words is "one hundred twenty-three billion, two hundred fifteen million, three hundred twenty thousand, four hundred forty-seven".