1021234011209 has 2 divisors, whose sum is σ = 1021234011210. Its totient is φ = 1021234011208.

The previous prime is 1021234011191. The next prime is 1021234011271. The reversal of 1021234011209 is 9021104321201.

1021234011209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 882810576400 + 138423434809 = 939580^2 + 372053^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021234011209 - 2¹² = 1021234007113 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021234011289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510617005604 + 510617005605.

It is an arithmetic number, because the mean of its divisors is an integer number (510617005605).

Almost surely, 2^{1021234011209} is an apocalyptic number.

It is an amenable number.

1021234011209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021234011209 is an equidigital number, since it uses as much as digits as its factorization.

1021234011209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 1021234011209 in words is "one trillion, twenty-one billion, two hundred thirty-four million, eleven thousand, two hundred nine".