126380731091 has 2 divisors, whose sum is σ = 126380731092. Its totient is φ = 126380731090.

The previous prime is 126380731063. The next prime is 126380731093. The reversal of 126380731091 is 190137083621.

It is a strong prime.

It is an emirp because it is prime and its reverse (190137083621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126380731091 is a prime.

Together with 126380731093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126380731093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63190365545 + 63190365546.

It is an arithmetic number, because the mean of its divisors is an integer number (63190365546).

Almost surely, 2^126380731091 is an apocalyptic number.

126380731091 is a deficient number, since it is larger than the sum of its proper divisors (1).

126380731091 is an equidigital number, since it uses as much as digits as its factorization.

126380731091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 41.

The spelling of 126380731091 in words is "one hundred twenty-six billion, three hundred eighty million, seven hundred thirty-one thousand, ninety-one".