12521109427 has 2 divisors, whose sum is σ = 12521109428. Its totient is φ = 12521109426.

The previous prime is 12521109371. The next prime is 12521109437. The reversal of 12521109427 is 72490112521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12521109427 - 2¹⁹ = 12520585139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12521109392 and 12521109401.

It is not a weakly prime, because it can be changed into another prime (12521109437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6260554713 + 6260554714.

It is an arithmetic number, because the mean of its divisors is an integer number (6260554714).

Almost surely, 2^12521109427 is an apocalyptic number.

12521109427 is a deficient number, since it is larger than the sum of its proper divisors (1).

12521109427 is an equidigital number, since it uses as much as digits as its factorization.

12521109427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 34.

The spelling of 12521109427 in words is "twelve billion, five hundred twenty-one million, one hundred nine thousand, four hundred twenty-seven".