21110041 has 2 divisors, whose sum is σ = 21110042.
Its totient is φ = 21110040.
The previous prime is 21110029. The next prime is 21110051. The reversal of 21110041 is 14001112.
Adding to 21110041 its reverse (14001112), we get a palindrome (35111153).
It is an a-pointer prime, because the next prime (21110051) can be obtained adding 21110041 to its sum of digits (10).
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 15210000 + 5900041 = 3900^2 + 2429^2
It is a cyclic number.
It is not a de Polignac number, because 21110041 - 213 = 21101849 is a prime.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (21110051) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555020 + 10555021.
It is an arithmetic number, because the mean of its divisors is an integer number (10555021).
Almost surely, 221110041 is an apocalyptic number.
It is an amenable number.
21110041 is a deficient number, since it is larger than the sum of its proper divisors (1).
21110041 is an equidigital number, since it uses as much as digits as its factorization.
21110041 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 8, while the sum is 10.
The square root of 21110041 is about 4594.5664648582.
The cubic root of 21110041 is about 276.3734748285.
The spelling of 21110041 in words is "twenty-one million, one hundred ten thousand, forty-one".