1060721021 has 2 divisors, whose sum is σ = 1060721022. Its totient is φ = 1060721020.

The previous prime is 1060721003. The next prime is 1060721027. The reversal of 1060721021 is 1201270601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1048852996 + 11868025 = 32386^2 + 3445^2 .

It is a cyclic number.

It is not a de Polignac number, because 1060721021 - 2¹⁸ = 1060458877 is a prime.

It is a super-2 number, since 2×1060721021² = 2250258168782564882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1060720984 and 1060721002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1060721027) 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 as a sum of consecutive naturals, namely, 530360510 + 530360511.

It is an arithmetic number, because the mean of its divisors is an integer number (530360511).

Almost surely, 2^1060721021 is an apocalyptic number.

It is an amenable number.

1060721021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1060721021 is an equidigital number, since it uses as much as digits as its factorization.

1060721021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 1060721021 is about 32568.7123018396. The cubic root of 1060721021 is about 1019.8439531241.

Adding to 1060721021 its reverse (1201270601), we get a palindrome (2261991622).

The spelling of 1060721021 in words is "one billion, sixty million, seven hundred twenty-one thousand, twenty-one".