126805221223691 has 2 divisors, whose sum is σ = 126805221223692. Its totient is φ = 126805221223690.

The previous prime is 126805221223673. The next prime is 126805221223819. The reversal of 126805221223691 is 196322122508621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126805221223691 - 2¹⁴ = 126805221207307 is a prime.

It is not a weakly prime, because it can be changed into another prime (126805221225691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63402610611845 + 63402610611846.

It is an arithmetic number, because the mean of its divisors is an integer number (63402610611846).

Almost surely, 2^{126805221223691} is an apocalyptic number.

126805221223691 is a deficient number, since it is larger than the sum of its proper divisors (1).

126805221223691 is an equidigital number, since it uses as much as digits as its factorization.

126805221223691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 126805221223691 in words is "one hundred twenty-six trillion, eight hundred five billion, two hundred twenty-one million, two hundred twenty-three thousand, six hundred ninety-one".