226021021 has 2 divisors, whose sum is σ = 226021022. Its totient is φ = 226021020.

The previous prime is 226021013. The next prime is 226021051. The reversal of 226021021 is 120120622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219188025 + 6832996 = 14805^2 + 2614^2 .

It is a cyclic number.

It is not a de Polignac number, because 226021021 - 2³ = 226021013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 226020986 and 226021004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (226021051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113010510 + 113010511.

It is an arithmetic number, because the mean of its divisors is an integer number (113010511).

Almost surely, 2^226021021 is an apocalyptic number.

It is an amenable number.

226021021 is a deficient number, since it is larger than the sum of its proper divisors (1).

226021021 is an equidigital number, since it uses as much as digits as its factorization.

226021021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 226021021 is about 15033.9955101763. The cubic root of 226021021 is about 609.1388197197.

Adding to 226021021 its reverse (120120622), we get a palindrome (346141643).

The spelling of 226021021 in words is "two hundred twenty-six million, twenty-one thousand, twenty-one".