1021210441 has 4 divisors (see below), whose sum is σ = 1021293252. Its totient is φ = 1021127632.

The previous prime is 1021210439. The next prime is 1021210447. The reversal of 1021210441 is 1440121201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 280227600 + 740982841 = 16740^2 + 27221^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021210441 - 2¹ = 1021210439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021210447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18790 + ... + 48943.

It is an arithmetic number, because the mean of its divisors is an integer number (255323313).

Almost surely, 2^1021210441 is an apocalyptic number.

It is an amenable number.

1021210441 is a deficient number, since it is larger than the sum of its proper divisors (82811).

1021210441 is an equidigital number, since it uses as much as digits as its factorization.

1021210441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82810.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1021210441 is about 31956.3834155244. The cubic root of 1021210441 is about 1007.0207408453.

Adding to 1021210441 its reverse (1440121201), we get a palindrome (2461331642).

The spelling of 1021210441 in words is "one billion, twenty-one million, two hundred ten thousand, four hundred forty-one".