12421453663 has 2 divisors, whose sum is σ = 12421453664. Its totient is φ = 12421453662.

The previous prime is 12421453619. The next prime is 12421453673. The reversal of 12421453663 is 36635412421.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12421453663 is a prime.

It is a super-2 number, since 2×12421453663² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12421453673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6210726831 + 6210726832.

It is an arithmetic number, because the mean of its divisors is an integer number (6210726832).

Almost surely, 2^12421453663 is an apocalyptic number.

12421453663 is a deficient number, since it is larger than the sum of its proper divisors (1).

12421453663 is an equidigital number, since it uses as much as digits as its factorization.

12421453663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 37.

The spelling of 12421453663 in words is "twelve billion, four hundred twenty-one million, four hundred fifty-three thousand, six hundred sixty-three".