12491023199429 has 2 divisors, whose sum is σ = 12491023199430. Its totient is φ = 12491023199428.

The previous prime is 12491023199383. The next prime is 12491023199437. The reversal of 12491023199429 is 92499132019421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8993461188100 + 3497562011329 = 2998910^2 + 1870177^2 .

It is a cyclic number.

It is not a de Polignac number, because 12491023199429 - 2¹² = 12491023195333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12491023199449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6245511599714 + 6245511599715.

It is an arithmetic number, because the mean of its divisors is an integer number (6245511599715).

Almost surely, 2^{12491023199429} is an apocalyptic number.

It is an amenable number.

12491023199429 is a deficient number, since it is larger than the sum of its proper divisors (1).

12491023199429 is an equidigital number, since it uses as much as digits as its factorization.

12491023199429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2519424, while the sum is 56.

The spelling of 12491023199429 in words is "twelve trillion, four hundred ninety-one billion, twenty-three million, one hundred ninety-nine thousand, four hundred twenty-nine".