12123540455023 has 8 divisors (see below), whose sum is σ = 12162760043616. Its totient is φ = 12084322387200.

The previous prime is 12123540455011. The next prime is 12123540455113. The reversal of 12123540455023 is 32055404532121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12123540455023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123540455003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16849963 + ... + 17554723.

It is an arithmetic number, because the mean of its divisors is an integer number (1520345005452).

Almost surely, 2^{12123540455023} is an apocalyptic number.

12123540455023 is a deficient number, since it is larger than the sum of its proper divisors (39219588593).

12123540455023 is an equidigital number, since it uses as much as digits as its factorization.

12123540455023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760385.

The product of its (nonzero) digits is 144000, while the sum is 37.

Adding to 12123540455023 its reverse (32055404532121), we get a palindrome (44178944987144).

The spelling of 12123540455023 in words is "twelve trillion, one hundred twenty-three billion, five hundred forty million, four hundred fifty-five thousand, twenty-three".