12521552515223 has 2 divisors, whose sum is σ = 12521552515224. Its totient is φ = 12521552515222.

The previous prime is 12521552515211. The next prime is 12521552515253. The reversal of 12521552515223 is 32251525512521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12521552515223 - 2¹⁰ = 12521552514199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12521552515253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6260776257611 + 6260776257612.

It is an arithmetic number, because the mean of its divisors is an integer number (6260776257612).

Almost surely, 2^{12521552515223} is an apocalyptic number.

12521552515223 is a deficient number, since it is larger than the sum of its proper divisors (1).

12521552515223 is an equidigital number, since it uses as much as digits as its factorization.

12521552515223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 300000, while the sum is 41.

The spelling of 12521552515223 in words is "twelve trillion, five hundred twenty-one billion, five hundred fifty-two million, five hundred fifteen thousand, two hundred twenty-three".