126730000321 has 2 divisors, whose sum is σ = 126730000322. Its totient is φ = 126730000320.

The previous prime is 126730000279. The next prime is 126730000333. The reversal of 126730000321 is 123000037621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123134319025 + 3595681296 = 350905^2 + 59964^2 .

It is an emirp because it is prime and its reverse (123000037621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126730000321 is a prime.

It is not a weakly prime, because it can be changed into another prime (126760000321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63365000160 + 63365000161.

It is an arithmetic number, because the mean of its divisors is an integer number (63365000161).

Almost surely, 2^126730000321 is an apocalyptic number.

It is an amenable number.

126730000321 is a deficient number, since it is larger than the sum of its proper divisors (1).

126730000321 is an equidigital number, since it uses as much as digits as its factorization.

126730000321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 25.

Adding to 126730000321 its reverse (123000037621), we get a palindrome (249730037942).

The spelling of 126730000321 in words is "one hundred twenty-six billion, seven hundred thirty million, three hundred twenty-one", and thus it is an aban number.