110305100021 has 2 divisors, whose sum is σ = 110305100022. Its totient is φ = 110305100020.

The previous prime is 110305099979. The next prime is 110305100029. The reversal of 110305100021 is 120001503011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110283103921 + 21996100 = 332089^2 + 4690^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-110305100021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 110305099969 and 110305100005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110305100029) 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, 55152550010 + 55152550011.

It is an arithmetic number, because the mean of its divisors is an integer number (55152550011).

Almost surely, 2^110305100021 is an apocalyptic number.

It is an amenable number.

110305100021 is a deficient number, since it is larger than the sum of its proper divisors (1).

110305100021 is an equidigital number, since it uses as much as digits as its factorization.

110305100021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30, while the sum is 14.

Adding to 110305100021 its reverse (120001503011), we get a palindrome (230306603032).

The spelling of 110305100021 in words is "one hundred ten billion, three hundred five million, one hundred thousand, twenty-one".