12423505321245 has 16 divisors (see below), whose sum is σ = 19877689500480. Its totient is φ = 6625842509184.

The previous prime is 12423505321231. The next prime is 12423505321309. The reversal of 12423505321245 is 54212350532421.

It is not a de Polignac number, because 12423505321245 - 2¹⁶ = 12423505255709 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2443362 + ... + 5551308.

It is an arithmetic number, because the mean of its divisors is an integer number (1242355593780).

Almost surely, 2^{12423505321245} is an apocalyptic number.

12423505321245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12423505321245 is a deficient number, since it is larger than the sum of its proper divisors (7454184179235).

12423505321245 is a wasteful number, since it uses less digits than its factorization.

12423505321245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3374444.

The product of its (nonzero) digits is 288000, while the sum is 39.

Adding to 12423505321245 its reverse (54212350532421), we get a palindrome (66635855853666).

The spelling of 12423505321245 in words is "twelve trillion, four hundred twenty-three billion, five hundred five million, three hundred twenty-one thousand, two hundred forty-five".