21312103131202 has 32 divisors (see below), whose sum is σ = 34584805609200. Its totient is φ = 9791355506688.

The previous prime is 21312103131181. The next prime is 21312103131373. The reversal of 21312103131202 is 20213130121312.

It can be written as a sum of positive squares in 8 ways, for example, as 6088067694801 + 15224035436401 = 2467401^2 + 3901799^2 .

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 15 ways as a sum of consecutive naturals, for example, 28308874 + ... + 29051962.

Almost surely, 2^{21312103131202} is an apocalyptic number.

21312103131202 is a deficient number, since it is larger than the sum of its proper divisors (13272702477998).

21312103131202 is a wasteful number, since it uses less digits than its factorization.

21312103131202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748150.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21312103131202 its reverse (20213130121312), we get a palindrome (41525233252514).

The spelling of 21312103131202 in words is "twenty-one trillion, three hundred twelve billion, one hundred three million, one hundred thirty-one thousand, two hundred two".