12421401247 has 2 divisors, whose sum is σ = 12421401248. Its totient is φ = 12421401246.

The previous prime is 12421401217. The next prime is 12421401277. The reversal of 12421401247 is 74210412421.

It is a balanced prime because it is at equal distance from previous prime (12421401217) and next prime (12421401277).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12421401247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12421401217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6210700623 + 6210700624.

It is an arithmetic number, because the mean of its divisors is an integer number (6210700624).

Almost surely, 2^12421401247 is an apocalyptic number.

12421401247 is a deficient number, since it is larger than the sum of its proper divisors (1).

12421401247 is an equidigital number, since it uses as much as digits as its factorization.

12421401247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 28.

Adding to 12421401247 its reverse (74210412421), we get a palindrome (86631813668).

The spelling of 12421401247 in words is "twelve billion, four hundred twenty-one million, four hundred one thousand, two hundred forty-seven".