12421442237 has 2 divisors, whose sum is σ = 12421442238. Its totient is φ = 12421442236.

The previous prime is 12421442219. The next prime is 12421442249. The reversal of 12421442237 is 73224412421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7169686276 + 5251755961 = 84674^2 + 72469^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12421442237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12421442837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6210721118 + 6210721119.

It is an arithmetic number, because the mean of its divisors is an integer number (6210721119).

Almost surely, 2^12421442237 is an apocalyptic number.

It is an amenable number.

12421442237 is a deficient number, since it is larger than the sum of its proper divisors (1).

12421442237 is an equidigital number, since it uses as much as digits as its factorization.

12421442237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21504, while the sum is 32.

Adding to 12421442237 its reverse (73224412421), we get a palindrome (85645854658).

The spelling of 12421442237 in words is "twelve billion, four hundred twenty-one million, four hundred forty-two thousand, two hundred thirty-seven".