1009091020202 has 16 divisors (see below), whose sum is σ = 1602695202120. Its totient is φ = 474860072448.

The previous prime is 1009091020181. The next prime is 1009091020213. The reversal of 1009091020202 is 2020201909001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 990998349121 + 18092671081 = 995489^2 + 134509^2 .

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 3319574 + ... + 3610782.

Almost surely, 2^{1009091020202} is an apocalyptic number.

1009091020202 is a deficient number, since it is larger than the sum of its proper divisors (593604181918).

1009091020202 is a wasteful number, since it uses less digits than its factorization.

1009091020202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393145.

The product of its (nonzero) digits is 648, while the sum is 26.

Adding to 1009091020202 its reverse (2020201909001), we get a palindrome (3029292929203).

The spelling of 1009091020202 in words is "one trillion, nine billion, ninety-one million, twenty thousand, two hundred two".