126520055201 has 4 divisors (see below), whose sum is σ = 126541364400. Its totient is φ = 126498746004.

The previous prime is 126520055191. The next prime is 126520055203. The reversal of 126520055201 is 102550025621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126520055201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126520055203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10645691 + ... + 10657568.

It is an arithmetic number, because the mean of its divisors is an integer number (31635341100).

Almost surely, 2^126520055201 is an apocalyptic number.

It is an amenable number.

126520055201 is a deficient number, since it is larger than the sum of its proper divisors (21309199).

126520055201 is an equidigital number, since it uses as much as digits as its factorization.

126520055201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21309198.

The product of its (nonzero) digits is 6000, while the sum is 29.

The spelling of 126520055201 in words is "one hundred twenty-six billion, five hundred twenty million, fifty-five thousand, two hundred one".