11010021001209 has 6 divisors (see below), whose sum is σ = 15903363668426. Its totient is φ = 7340014000800.

The previous prime is 11010021001079. The next prime is 11010021001229. The reversal of 11010021001209 is 90210012001011.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9198197319609 + 1811823681600 = 3032853^2 + 1346040^2 .

It is not a de Polignac number, because 11010021001209 - 2²³ = 11010012612601 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11010021001191 and 11010021001200.

It is not an unprimeable number, because it can be changed into a prime (11010021001229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 611667833392 + ... + 611667833409.

Almost surely, 2^{11010021001209} is an apocalyptic number.

It is an amenable number.

11010021001209 is a deficient number, since it is larger than the sum of its proper divisors (4893342667217).

11010021001209 is a wasteful number, since it uses less digits than its factorization.

11010021001209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223335666807 (or 1223335666804 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The spelling of 11010021001209 in words is "eleven trillion, ten billion, twenty-one million, one thousand, two hundred nine".