12012537815123 has 2 divisors, whose sum is σ = 12012537815124. Its totient is φ = 12012537815122.

The previous prime is 12012537815107. The next prime is 12012537815147. The reversal of 12012537815123 is 32151873521021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12012537815123 - 2⁴ = 12012537815107 is a prime.

It is not a weakly prime, because it can be changed into another prime (12012537815423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006268907561 + 6006268907562.

It is an arithmetic number, because the mean of its divisors is an integer number (6006268907562).

Almost surely, 2^{12012537815123} is an apocalyptic number.

12012537815123 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012537815123 is an equidigital number, since it uses as much as digits as its factorization.

12012537815123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 41.

The spelling of 12012537815123 in words is "twelve trillion, twelve billion, five hundred thirty-seven million, eight hundred fifteen thousand, one hundred twenty-three".