1021060561 has 2 divisors, whose sum is σ = 1021060562. Its totient is φ = 1021060560.

The previous prime is 1021060559. The next prime is 1021060567. The reversal of 1021060561 is 1650601201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 939790336 + 81270225 = 30656^2 + 9015^2 .

It is an emirp because it is prime and its reverse (1650601201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1021060561 - 2¹ = 1021060559 is a prime.

Together with 1021060559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1021060567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510530280 + 510530281.

It is an arithmetic number, because the mean of its divisors is an integer number (510530281).

Almost surely, 2^1021060561 is an apocalyptic number.

It is an amenable number.

1021060561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021060561 is an equidigital number, since it uses as much as digits as its factorization.

1021060561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 1021060561 is about 31954.0382580981. The cubic root of 1021060561 is about 1006.9714726282.

Adding to 1021060561 its reverse (1650601201), we get a palindrome (2671661762).

The spelling of 1021060561 in words is "one billion, twenty-one million, sixty thousand, five hundred sixty-one".