21214025205321 has 16 divisors (see below), whose sum is σ = 30461296712000. Its totient is φ = 13054728035520.

The previous prime is 21214025205311. The next prime is 21214025205371. The reversal of 21214025205321 is 12350252041212.

It is not a de Polignac number, because 21214025205321 - 2¹³ = 21214025197129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21214025205301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9029331 + ... + 11133591.

It is an arithmetic number, because the mean of its divisors is an integer number (1903831044500).

Almost surely, 2^{21214025205321} is an apocalyptic number.

It is an amenable number.

21214025205321 is a deficient number, since it is larger than the sum of its proper divisors (9247271506679).

21214025205321 is a wasteful number, since it uses less digits than its factorization.

21214025205321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2362776.

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 21214025205321 its reverse (12350252041212), we get a palindrome (33564277246533).

The spelling of 21214025205321 in words is "twenty-one trillion, two hundred fourteen billion, twenty-five million, two hundred five thousand, three hundred twenty-one".