126210346015321 has 2 divisors, whose sum is σ = 126210346015322. Its totient is φ = 126210346015320.

The previous prime is 126210346015279. The next prime is 126210346015367. The reversal of 126210346015321 is 123510643012621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76974933943296 + 49235412072025 = 8773536^2 + 7016795^2 .

It is a cyclic number.

It is not a de Polignac number, because 126210346015321 - 2¹¹ = 126210346013273 is a prime.

It is a super-4 number, since 4×126210346015321⁴ (a number of 58 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (126210346012321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63105173007660 + 63105173007661.

It is an arithmetic number, because the mean of its divisors is an integer number (63105173007661).

Almost surely, 2^{126210346015321} is an apocalyptic number.

It is an amenable number.

126210346015321 is a deficient number, since it is larger than the sum of its proper divisors (1).

126210346015321 is an equidigital number, since it uses as much as digits as its factorization.

126210346015321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 37.

Adding to 126210346015321 its reverse (123510643012621), we get a palindrome (249720989027942).

The spelling of 126210346015321 in words is "one hundred twenty-six trillion, two hundred ten billion, three hundred forty-six million, fifteen thousand, three hundred twenty-one".