21412204434321 has 32 divisors (see below), whose sum is σ = 30701183500800. Its totient is φ = 13226842804224.

The previous prime is 21412204434241. The next prime is 21412204434331. The reversal of 21412204434321 is 12343440221412.

It is not a de Polignac number, because 21412204434321 - 2³⁴ = 21395024565137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21412204434331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11609305 + ... + 13326678.

It is an arithmetic number, because the mean of its divisors is an integer number (959411984400).

Almost surely, 2^{21412204434321} is an apocalyptic number.

It is an amenable number.

21412204434321 is a deficient number, since it is larger than the sum of its proper divisors (9288979066479).

21412204434321 is a wasteful number, since it uses less digits than its factorization.

21412204434321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24936265.

The product of its (nonzero) digits is 36864, while the sum is 33.

Adding to 21412204434321 its reverse (12343440221412), we get a palindrome (33755644655733).

The spelling of 21412204434321 in words is "twenty-one trillion, four hundred twelve billion, two hundred four million, four hundred thirty-four thousand, three hundred twenty-one".