100551720616213 has 2 divisors, whose sum is σ = 100551720616214. Its totient is φ = 100551720616212.

The previous prime is 100551720616189. The next prime is 100551720616219. The reversal of 100551720616213 is 312616027155001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68419068782724 + 32132651833489 = 8271582^2 + 5668567^2 .

It is an emirp because it is prime and its reverse (312616027155001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100551720616213 - 2⁴¹ = 98352697360661 is a prime.

It is a super-2 number, since 2×100551720616213² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100551720616219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50275860308106 + 50275860308107.

It is an arithmetic number, because the mean of its divisors is an integer number (50275860308107).

Almost surely, 2^{100551720616213} is an apocalyptic number.

It is an amenable number.

100551720616213 is a deficient number, since it is larger than the sum of its proper divisors (1).

100551720616213 is an equidigital number, since it uses as much as digits as its factorization.

100551720616213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 40.

The spelling of 100551720616213 in words is "one hundred trillion, five hundred fifty-one billion, seven hundred twenty million, six hundred sixteen thousand, two hundred thirteen".