1021310004509 has 2 divisors, whose sum is σ = 1021310004510. Its totient is φ = 1021310004508.

The previous prime is 1021310004503. The next prime is 1021310004541. The reversal of 1021310004509 is 9054000131201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1015922884900 + 5387119609 = 1007930^2 + 73397^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021310004509 - 2¹⁶ = 1021309938973 is a prime.

It is a super-3 number, since 3×1021310004509³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021310004503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510655002254 + 510655002255.

It is an arithmetic number, because the mean of its divisors is an integer number (510655002255).

Almost surely, 2^{1021310004509} is an apocalyptic number.

It is an amenable number.

1021310004509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021310004509 is an equidigital number, since it uses as much as digits as its factorization.

1021310004509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The spelling of 1021310004509 in words is "one trillion, twenty-one billion, three hundred ten million, four thousand, five hundred nine".