126211807013 has 2 divisors, whose sum is σ = 126211807014. Its totient is φ = 126211807012.

The previous prime is 126211807009. The next prime is 126211807019. The reversal of 126211807013 is 310708112621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106297517089 + 19914289924 = 326033^2 + 141118^2 .

It is a cyclic number.

It is not a de Polignac number, because 126211807013 - 2² = 126211807009 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126211807019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63105903506 + 63105903507.

It is an arithmetic number, because the mean of its divisors is an integer number (63105903507).

Almost surely, 2^126211807013 is an apocalyptic number.

It is an amenable number.

126211807013 is a deficient number, since it is larger than the sum of its proper divisors (1).

126211807013 is an equidigital number, since it uses as much as digits as its factorization.

126211807013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 32.

Adding to 126211807013 its reverse (310708112621), we get a palindrome (436919919634).

The spelling of 126211807013 in words is "one hundred twenty-six billion, two hundred eleven million, eight hundred seven thousand, thirteen".