1021056055709 has 2 divisors, whose sum is σ = 1021056055710. Its totient is φ = 1021056055708.

The previous prime is 1021056055699. The next prime is 1021056055753. The reversal of 1021056055709 is 9075506501201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 760476434809 + 260579620900 = 872053^2 + 510470^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021056055709 - 2⁴ = 1021056055693 is a prime.

It is a super-2 number, since 2×1021056055709² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021056055609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510528027854 + 510528027855.

It is an arithmetic number, because the mean of its divisors is an integer number (510528027855).

Almost surely, 2^{1021056055709} is an apocalyptic number.

It is an amenable number.

1021056055709 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021056055709 is an equidigital number, since it uses as much as digits as its factorization.

1021056055709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94500, while the sum is 41.

The spelling of 1021056055709 in words is "one trillion, twenty-one billion, fifty-six million, fifty-five thousand, seven hundred nine".