100000061081 has 2 divisors, whose sum is σ = 100000061082. Its totient is φ = 100000061080.

The previous prime is 100000061059. The next prime is 100000061107. The reversal of 100000061081 is 180160000001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97665625225 + 2334435856 = 312515^2 + 48316^2 .

It is an emirp because it is prime and its reverse (180160000001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100000061081 - 2⁶ = 100000061017 is a prime.

It is a super-2 number, since 2×100000061081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (100000060081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50000030540 + 50000030541.

It is an arithmetic number, because the mean of its divisors is an integer number (50000030541).

Almost surely, 2^100000061081 is an apocalyptic number.

It is an amenable number.

100000061081 is a deficient number, since it is larger than the sum of its proper divisors (1).

100000061081 is an equidigital number, since it uses as much as digits as its factorization.

100000061081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 100000061081 its reverse (180160000001), we get a palindrome (280160061082).

The spelling of 100000061081 in words is "one hundred billion, sixty-one thousand, eighty-one".