1020244021 has 2 divisors, whose sum is σ = 1020244022. Its totient is φ = 1020244020.

The previous prime is 1020244003. The next prime is 1020244039. The reversal of 1020244021 is 1204420201.

It is a balanced prime because it is at equal distance from previous prime (1020244003) and next prime (1020244039).

It can be written as a sum of positive squares in only one way, i.e., 1018311921 + 1932100 = 31911^2 + 1390^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020244021 - 2¹⁷ = 1020112949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020243986 and 1020244004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020244091) 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, 510122010 + 510122011.

It is an arithmetic number, because the mean of its divisors is an integer number (510122011).

Almost surely, 2^1020244021 is an apocalyptic number.

It is an amenable number.

1020244021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020244021 is an equidigital number, since it uses as much as digits as its factorization.

1020244021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1020244021 is about 31941.2589138249. The cubic root of 1020244021 is about 1006.7029767151.

Adding to 1020244021 its reverse (1204420201), we get a palindrome (2224664222).

The spelling of 1020244021 in words is "one billion, twenty million, two hundred forty-four thousand, twenty-one".