110020921 has 2 divisors, whose sum is σ = 110020922. Its totient is φ = 110020920.

The previous prime is 110020919. The next prime is 110020927. The reversal of 110020921 is 129020011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109495296 + 525625 = 10464^2 + 725^2 .

It is an emirp because it is prime and its reverse (129020011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 110020921 - 2¹ = 110020919 is a prime.

Together with 110020919, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 110020895 and 110020904.

It is not a weakly prime, because it can be changed into another prime (110020927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55010460 + 55010461.

It is an arithmetic number, because the mean of its divisors is an integer number (55010461).

Almost surely, 2^110020921 is an apocalyptic number.

It is an amenable number.

110020921 is a deficient number, since it is larger than the sum of its proper divisors (1).

110020921 is an equidigital number, since it uses as much as digits as its factorization.

110020921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 110020921 is about 10489.0858038249. The cubic root of 110020921 is about 479.1723599307.

Adding to 110020921 its reverse (129020011), we get a palindrome (239040932).

The spelling of 110020921 in words is "one hundred ten million, twenty thousand, nine hundred twenty-one".