21002013320202 has 36 divisors (see below), whose sum is σ = 46641294570390. Its totient is φ = 6829923021120.

The previous prime is 21002013320153. The next prime is 21002013320209. The reversal of 21002013320202 is 20202331020012.

21002013320202 is a `hidden beast` number, since 210 + 0 + 201 + 33 + 20 + 202 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 2223233084601 + 18778780235601 = 1491051^2 + 4333449^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21002013320209) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 347018677 + ... + 347079192.

Almost surely, 2^{21002013320202} is an apocalyptic number.

21002013320202 is an abundant number, since it is smaller than the sum of its proper divisors (25639281250188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21002013320202 is a wasteful number, since it uses less digits than its factorization.

21002013320202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694097959 (or 694097915 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21002013320202 its reverse (20202331020012), we get a palindrome (41204344340214).

The spelling of 21002013320202 in words is "twenty-one trillion, two billion, thirteen million, three hundred twenty thousand, two hundred two".