100555051105381 has 2 divisors, whose sum is σ = 100555051105382. Its totient is φ = 100555051105380.

The previous prime is 100555051105279. The next prime is 100555051105387. The reversal of 100555051105381 is 183501150555001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79484802930625 + 21070248174756 = 8915425^2 + 4590234^2 .

It is a cyclic number.

It is not a de Polignac number, because 100555051105381 - 2¹⁹ = 100555050581093 is a prime.

It is a super-2 number, since 2×100555051105381² (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 (100555051105387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50277525552690 + 50277525552691.

It is an arithmetic number, because the mean of its divisors is an integer number (50277525552691).

Almost surely, 2^{100555051105381} is an apocalyptic number.

It is an amenable number.

100555051105381 is a deficient number, since it is larger than the sum of its proper divisors (1).

100555051105381 is an equidigital number, since it uses as much as digits as its factorization.

100555051105381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75000, while the sum is 40.

The spelling of 100555051105381 in words is "one hundred trillion, five hundred fifty-five billion, fifty-one million, one hundred five thousand, three hundred eighty-one".