1002020211205 has 32 divisors (see below), whose sum is σ = 1372418951904. Its totient is φ = 695751745536.

The previous prime is 1002020211193. The next prime is 1002020211211. The reversal of 1002020211205 is 5021120202001.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 318927879169 + 683092332036 = 564737^2 + 826494^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002020211205 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 702547 + ... + 1580383.

It is an arithmetic number, because the mean of its divisors is an integer number (42888092247).

Almost surely, 2^{1002020211205} is an apocalyptic number.

It is an amenable number.

1002020211205 is a deficient number, since it is larger than the sum of its proper divisors (370398740699).

1002020211205 is a wasteful number, since it uses less digits than its factorization.

1002020211205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878905.

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 1002020211205 its reverse (5021120202001), we get a palindrome (6023140413206).

The spelling of 1002020211205 in words is "one trillion, two billion, twenty million, two hundred eleven thousand, two hundred five".