100100100110861 has 2 divisors, whose sum is σ = 100100100110862. Its totient is φ = 100100100110860.

The previous prime is 100100100110819. The next prime is 100100100110993. The reversal of 100100100110861 is 168011001001001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65234795161636 + 34865304949225 = 8076806^2 + 5904685^2 .

It is a cyclic number.

It is not a de Polignac number, because 100100100110861 - 2¹⁸ = 100100099848717 is a prime.

It is a super-2 number, since 2×100100100110861² (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 (100100100110161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50050050055430 + 50050050055431.

It is an arithmetic number, because the mean of its divisors is an integer number (50050050055431).

Almost surely, 2^{100100100110861} is an apocalyptic number.

It is an amenable number.

100100100110861 is a deficient number, since it is larger than the sum of its proper divisors (1).

100100100110861 is an equidigital number, since it uses as much as digits as its factorization.

100100100110861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 20.

Adding to 100100100110861 its reverse (168011001001001), we get a palindrome (268111101111862).

The spelling of 100100100110861 in words is "one hundred trillion, one hundred billion, one hundred million, one hundred ten thousand, eight hundred sixty-one".