110420021 has 2 divisors, whose sum is σ = 110420022. Its totient is φ = 110420020.

The previous prime is 110420003. The next prime is 110420027. The reversal of 110420021 is 120024011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69639025 + 40780996 = 8345^2 + 6386^2 .

It is a cyclic number.

It is not a de Polignac number, because 110420021 - 2¹⁴ = 110403637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 110419984 and 110420011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110420027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55210010 + 55210011.

It is an arithmetic number, because the mean of its divisors is an integer number (55210011).

Almost surely, 2^110420021 is an apocalyptic number.

It is an amenable number.

110420021 is a deficient number, since it is larger than the sum of its proper divisors (1).

110420021 is an equidigital number, since it uses as much as digits as its factorization.

110420021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 110420021 is about 10508.0931191154. The cubic root of 110420021 is about 479.7510587038.

Adding to 110420021 its reverse (120024011), we get a palindrome (230444032).

The spelling of 110420021 in words is "one hundred ten million, four hundred twenty thousand, twenty-one".