110200021 has 2 divisors, whose sum is σ = 110200022.
Its totient is φ = 110200020.
The previous prime is 110199983. The next prime is 110200033. The reversal of 110200021 is 120002011.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 109620900 + 579121 = 10470^2 + 761^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-110200021 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 110199977 and 110200013.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (110200081) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55100010 + 55100011.
It is an arithmetic number, because the mean of its divisors is an integer number (55100011).
Almost surely, 2110200021 is an apocalyptic number.
It is an amenable number.
110200021 is a deficient number, since it is larger than the sum of its proper divisors (1).
110200021 is an equidigital number, since it uses as much as digits as its factorization.
110200021 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 4, while the sum is 7.
The square root of 110200021 is about 10497.6197778354.
The cubic root of 110200021 is about 479.4322294266.
Adding to 110200021 its reverse (120002011), we get a palindrome (230202032).
The spelling of 110200021 in words is "one hundred ten million, two hundred thousand, twenty-one".