100121111005717 has 2 divisors, whose sum is σ = 100121111005718. Its totient is φ = 100121111005716.

The previous prime is 100121111005687. The next prime is 100121111005739. The reversal of 100121111005717 is 717500111121001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56801032929316 + 43320078076401 = 7536646^2 + 6581799^2 .

It is a cyclic number.

It is not a de Polignac number, because 100121111005717 - 2⁴³ = 91325017983509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100821111005717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50060555502858 + 50060555502859.

It is an arithmetic number, because the mean of its divisors is an integer number (50060555502859).

Almost surely, 2^{100121111005717} is an apocalyptic number.

It is an amenable number.

100121111005717 is a deficient number, since it is larger than the sum of its proper divisors (1).

100121111005717 is an equidigital number, since it uses as much as digits as its factorization.

100121111005717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 490, while the sum is 28.

Adding to 100121111005717 its reverse (717500111121001), we get a palindrome (817621222126718).

The spelling of 100121111005717 in words is "one hundred trillion, one hundred twenty-one billion, one hundred eleven million, five thousand, seven hundred seventeen".