21031134210213 has 16 divisors (see below), whose sum is σ = 28125328049280. Its totient is φ = 13978909753344.

The previous prime is 21031134210167. The next prime is 21031134210257. The reversal of 21031134210213 is 31201243113012.

It is not a de Polignac number, because 21031134210213 - 2¹³ = 21031134202021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031134210613) by changing a digit.

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, 6318481 + ... + 9054582.

It is an arithmetic number, because the mean of its divisors is an integer number (1757833003080).

Almost surely, 2^{21031134210213} is an apocalyptic number.

It is an amenable number.

21031134210213 is a deficient number, since it is larger than the sum of its proper divisors (7094193839067).

21031134210213 is a wasteful number, since it uses less digits than its factorization.

21031134210213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15374428.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 21031134210213 its reverse (31201243113012), we get a palindrome (52232377323225).

The spelling of 21031134210213 in words is "twenty-one trillion, thirty-one billion, one hundred thirty-four million, two hundred ten thousand, two hundred thirteen".