110110031021 has 2 divisors, whose sum is σ = 110110031022. Its totient is φ = 110110031020.

The previous prime is 110110030993. The next prime is 110110031041. The reversal of 110110031021 is 120130011011.

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., 80684402500 + 29425628521 = 284050^2 + 171539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-110110031021 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 110110030993 and 110110031011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110110031041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55055015510 + 55055015511.

It is an arithmetic number, because the mean of its divisors is an integer number (55055015511).

Almost surely, 2^110110031021 is an apocalyptic number.

It is an amenable number.

110110031021 is a deficient number, since it is larger than the sum of its proper divisors (1).

110110031021 is an equidigital number, since it uses as much as digits as its factorization.

110110031021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6, while the sum is 11.

Adding to 110110031021 its reverse (120130011011), we get a palindrome (230240042032).

The spelling of 110110031021 in words is "one hundred ten billion, one hundred ten million, thirty-one thousand, twenty-one".