21012321320202 has 16 divisors (see below), whose sum is σ = 42817560426720. Its totient is φ = 6871954142352.

The previous prime is 21012321320183. The next prime is 21012321320267. The reversal of 21012321320202 is 20202312321012.

It is a super-3 number, since 3×21012321320202³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33038240752 + ... + 33038241387.

It is an arithmetic number, because the mean of its divisors is an integer number (2676097526670).

Almost surely, 2^{21012321320202} is an apocalyptic number.

21012321320202 is an abundant number, since it is smaller than the sum of its proper divisors (21805239106518).

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

21012321320202 is a wasteful number, since it uses less digits than its factorization.

21012321320202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66076482197.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21012321320202 its reverse (20202312321012), we get a palindrome (41214633641214).

The spelling of 21012321320202 in words is "twenty-one trillion, twelve billion, three hundred twenty-one million, three hundred twenty thousand, two hundred two".